Enhancing an Inspection Plan

Objectives

After completing this lesson, you will be able to:
  • Add inspection characteristics to an inspection plan
  • Add materials to the inspection plan and use building blocks to facilitate inspection plan management

Inspection Characteristics in the Task List

Overview

The Quality Planner uses inspection characteristics to define the items to be inspected and the specifications for the inspection. From a technical standpoint, the Planner assigns one or more characteristics to each inspection operation. The figure displays the data that the Quality Planner manages:

The Quality Planner defines various settings when defining an inspection characteristic in the task list. Refer to the following text for more information.

The Quality Planner maintains the following information:

  • Characteristic type: Is the characteristic quantitative (for example, length or weight) or qualitative (for example OK/NOK, or packaging material)?

  • The control indicators affect the further processing of the inspection characteristic. For a detailed explanation, refer to the SAP Help Portal.

  • Does the planner use a master inspection characteristic (MIC)? If so, data from the MIC is copied or referenced. We address this in the next section.

  • The characteristic text informs the Quality Technician what to inspect or measure.

    The Planner can create short and long texts in different languages for the master inspection characteristic. The language in which the master inspection characteristic is displayed in the task list depends on how it was integrated (referenced or copied). Only in referenced master inspection characteristics are short and long texts displayed according to the user's logon language.

  • The system uses the sampling procedure to calculate the sample size and during result valuation. For example, the Quality Planner assigns a fixed sample size of 5 PC and an acceptance number of 1. During result recording, the Quality Technician inspects 5 PC. If there is one or fewer defect items, the system accepts the characteristic. Note that you must enable the use of a sampling procedure in the characteristics control indicator. If you don't assign a sampling procedure, the system uses the plant's default value from customizing or, if no default exists, a 100% inspection.

  • If the Quality Technician needs equipment or tools to measure a characteristic, the Quality Planner assigns the equipment here. Note that, as a prerequisite, the equipment or tool must also be assigned at the operation level and a respective control indicator must be active.

  • If you want to use dynamic modification at the characteristic level, the Quality Planner defines the dynamization parameters for the characteristic.

  • When measuring a characteristic, the Quality Technician must use a specific inspection method. In this case, the Quality Planner assigns the inspection method to the characteristic. The inspection method must be available in the system as a master record and cannot be created directly in the inspection plan.

  • To assign attributes for qualitative characteristics, the Quality Planner uses catalogs. Additionally, they predefine the code of the defect that the system generates when the characteristic is rejected. It is important to note that automatic defect creation must be enabled in the characteristics control indicator.

Using Reference Characteristics or Incomplete/Complete Copy Models

After reviewing the guidelines provided, apparently the Quality Planner is responsible for making various manual settings to define an inspection characteristic. However, to simplify and standardize the process of defining an inspection plan, SAP suggests avoiding the direct definition of characteristics within the plan. Instead, it is recommended that the Quality Planner use master inspection characteristics (MIC) within the inspection plan whenever feasible. The options available to the Planner will depend on whether the MIC is a reference characteristic or an (in)complete copy model:

The Quality Planner can either reference a master inspection characteristic in an inspection operation or copy a complete or incomplete copy model MIC into an operation. Both variants require that there exist a respective master record for the MIC. Also note that the MIC must have been released.
  • If the MIC is a reference characteristic, the Planner references it in the plan. At this point, the MIC cannot be changed. Any changes made to the MIC master data (for example codes of characteristic attributes, tolerance limits, and so on) are automatically applied to the inspection plan. When the Planner references a master inspection characteristic, the system automatically chooses the current version of the master inspection characteristic.

    A typical example of this is the packaging material. Regardless of the material being shipped, your company uses plastic foil, wood wool, or paper cutting for all packaging purposes. To implement this scenario, the Quality Planner defines one qualitative MIC and assigns a selected set that includes plastic foil, wood wool, paper cutting, and no packaging material as possible attributes. When defining the goods issue inspection, the Quality Planner references the MIC in all inspection plans for goods issue. If you decide to no longer use plastic foil, the Quality Planner can change the MIC and assign a different selected set without the entry for plastic foil. Since the characteristic is referenced, the change will automatically be applied to all inspection plans that use the MIC.

  • If the MIC is an (in)complete copy model, the Planner copies the master data settings from the MIC into the inspection plan. They then modify the characteristic to align with the inspected material or other business requirements. When changing the MIC, the changes are not automatically applied to the inspection plan.

    A practical example is the length of a material: Since the length depends on the material being manufactured, the Planner cannot predefine the length in the MIC. When assigning the MIC to the task list (which also applies to a material), the Planner knows the target length and the allowed tolerances. If the tolerance values change, for example, due to a change in the manufacturing process, the task list must be adjusted.

Note that in both cases, the respective MIC must have been released before they can use it in an inspection plan.

By utilizing predefined MICs in inspection plans, not only is the plan's definition made easier, but it also simplifies the evaluation of inspection results for the Quality Engineer. The Quality Engineer can analyze the history of inspection results at the MIC level using the Result History app.

If the Quality Planner wants to obtain an overview where they used a specific MIC, the SAP S/4HANA system offers a where-used list for master inspection characteristics.

Note

If you don't want to define MICs or if you're unable to standardize your inspections for a business reason, the Quality Planner can also create inspection characteristics directly in the inspection plan. This approach is flexible because it allows users to define the characteristic directly where they need it. However, users cannot reuse a characteristic defined in one plan in another inspection plan.

Furthermore, analyzing the result history on inspection characteristic level is more cumbersome compared to performing the analysis on the MIC level. Another disadvantage of defining characteristics directly in an inspection plan is the high manual effort required (→ you must make all settings in the plan) and the high probability for errors (→ typos or incorrect settings).

Calculated Inspection Characteristics

Consider a situation where a desired value can't be directly measured, and other characteristics must be measured and used to calculate the intended value. SAP S/4HANA provides calculated inspection characteristics to implement this scenario. The following image illustrates an example of a calculated inspection characteristic:

The image shows an example of a calculated inspection characteristic: The volume of a cylinder is calculated when the user enters the cylinder's diameter and height. The image also shows the calculation formula and that single values or mean values can be taken into account. Alternatively, you can define function modules for complex calculations.

In the example, the characteristic of interest is the volume of a cylinder (characteristic 30). As you cannot easily measure the cylinders volume directly, the Quality Planner instructs the Quality Technician to measure the cylinders diameter (characteristic 10) and height (characteristic 20), respectively. By using the diameter and the height, it is easy to calculate the cylinders volume using the displayed formula. The formula is as follows:

Code Snippet
1
Volume = (Single value of characteristic 10 * Single value of characteristic 10) * π/4 * (Single value of characteristic 20)

The formula uses A0 to represent the measured value of a single unit. The SAP S/4HANA system offers more standard parameters, such as the arithmetic mean of multiple measured values and the variance of multiple measured values. For complex calculations, your Application Consultant and Developer can define function modules if needed.

Note

The Application Consultant defines the parameters for the calculated inspection characteristic in Customizing: Quality ManagementQuality InspectionResults RecordingDefine Parameters for Calculated Characteristics.

To flag a characteristic as calculated characteristic, the Quality Planner specifies this in the control indicator for the inspection characteristic. They then assign a corresponding formula in the detail screen of the inspection characteristic. In the formula, you can use mathematical standard functions and numerical values.

Note

You can only calculate inspection results for inspection characteristics within one operation.

Conditional Inspection Characteristics

Imagine a situation where you must conduct a functional test on a device. Only if the initial test is successful, you can proceed with a more thorough inspection and measure additional characteristics. SAP S/4HANA provides a solution for this scenario called Conditional Inspection Characteristics. The image below illustrates an example of a pump:

The image shows an example of conditional inspection characteristics in the inspection plan. Following the functional test of a pump, the planner defined two scenarios: If the functional test is accepted, the technician measures the pumps power consumption and pressure. If the functional test is rejected, the technician records the type of defect as a qualitative inspection characteristic. During results recording, the functional test passes and the system activates the characteristics power consumption and pump pressure.

In the inspection plan, the Quality Planner specifies that the Quality Technician should initially conduct a functional test of the pump (CH 10). If the test is successful, they should then proceed to measure the power consumption (CH 20) and pressure (CH 30) of the pump. In the event of a failed functional test, the Quality Technician should document the type of defect as an attributive inspection characteristic (CH 40).

During results recording, the system locks three characteristics (20, 30, and 40) until the Quality Technician records an inspection result for the functional test (CH 10) and valuates the result. Depending on the result valuation (→ accepted or rejected), the system activates either the characteristics power consumption and pump pressure (for functional test accepted) or the characteristic type of defect (for functional test rejected).

Note

The inspection of conditional inspection characteristics (After Acceptance, After Rejection) generally depends on the results of the previous required inspection characteristic within the same operation. The Quality Planner defines in the control indicators for the inspection characteristic whether a conditional inspection characteristic is activated after the lead characteristic is accepted or rejected. For example, if the lead characteristic is accepted, the Quality Planner may activate a conditional inspection characteristic for further inspection.

Changes to the Inspection Plan

Changes to inspection plans are documented and can therefore be traced. The following image shows an example:

To display changes to an inspection plan, use the app Display Inspection Plan Changes. For more information, refer to the following test.

In the example, the Quality Planner wants to know all changes to a specific plan. After performing the selection, the system displays the task list changes (when using the app Display Inspection Plan Changes) or the related change documents (when using the app Inspection Plan Display Change Documents).

In the list of results, you see, for example, that the materials T-BQ125 and T-BQ225 were assigned to the task list header on 23.02.2023.

Hint

Changing and especially keeping track of changes to inspection plans can be cumbersome. The SAP S/4HANA system offers the objects change master and change record to implement changes to an inspection plan in a compliant manner. Please refer to the Application Documentation for additional information.

Dynamic Modification in the Task List

Dynamic Modification in the Task List

In SAP S/4HANA, the Quality Planner uses dynamic modification rules to vary the inspection scope.

They can assign modification rules at different levels to fulfill the requirements of various business scenarios. Play the video to learn more.

Note

Dynamic modification is not possible with optional inspection characteristics.

The video explained how dynamic modification can be assigned on various levels. For your knowledge recap, the following graphics illustrate the key differences again.

This is the illustration of dynamic modification on the inspection plan and on the inspection type level:

The Quality Planner can assign dynamic modification to an inspection plan. If there are multiple inspection types referring to the same inspection plan, both inspection types have one shared quality level. Alternatively, the Quality Planner can assign dynamic modification to the inspection type level. If sere are multiple inspection types referring to the same inspection plan, each inspection type has its own quality level. For more details, please refer to the following text.

The following figure illustrates an example of dynamic modification at the inspection characteristic level:

The Quality Planner can assign dynamic modification to the characteristics in the inspection plan. If this is the case, each inspection characteristic has its own quality level. For more information, please refer to the following text.

Note

For more information about dynamic modification, refer to the SAP Help Portal.

The Quality Planner applies dynamic modification at different levels. Now, let's explore two variants of how the SAP S/4HANA system applies dynamic modification:

  • Dynamic modification at the lot creation

  • Dynamic modification at the usage decision

Dynamic Modification at Lot Creation

Note

From a business perspective, you can consider this scenario as an "optimistic scenario". You can use this scenario if your quality inspections are usually accepted and you want to quickly reduce your inspection scope and efforts.

The following image illustrates an example of the dynamic modification process, where you update the quality level when creating a lot:

The figure illustrates the process of dynamically modifying a lot during lot creation. Additional details will be discussed in the following text.

When you create an inspection lot (1), for example when the Warehouse Clerk posts a goods receipt for a material with goods receipt inspection, the system checks the material's quality level (2) and applies the inspection severity to the inspection lot (3). Then, the Quality Technician performs result recording (5) and the Quality Technician makes the usage decision (5).

If the Quality Planner has set the indicator Dynamic modification at lot creation in the dynamic modification rule, the system immediately updates the quality level for the next inspection lot after determining the sample for the current inspection lot (4). The system assumes that the quality inspection of the current inspection lot is OK and automatically assigns the valuation Accepted. Therefore, if the underlying dynamic modification rule requires a state change, for example to a less severe inspection scope or even a skipped inspection, the next inspection lot will be inspected accordingly.

When an inspection characteristic is rejected in result recording (5,6), the quality level is updated again after the usage decision is made (7), specifically for the not OK case. However, the subsequent change in the quality level does not affect inspection lots created in the meantime. To transfer the new inspection severity to already existing inspection lots, the Quality Engineer must cancel the sample calculation of these inspection lots. They must then manually trigger the lot size calculation again. However, this approach only works if you have not yet recorded results for these inspection lots.

Dynamic Modification at Usage Decision

Note

From a business perspective, you can consider this scenario as a "pessimistic scenario". You can use this scenario if you want to reduce your inspection scope and efforts only when you are certain that the supplier delivers materials in good quality, for example.

The following image illustrates an example of the dynamic modification process, where you update the quality level during the usage decision.

The figure illustrates the dynamic modification process when you apply dynamic modification at usage decision. We'll discuss additional details in the following text.

When creating an inspection lot (1), such as when the Warehouse Clerk posts a goods receipt for a material with goods receipt inspection, the system checks the quality level of the material (2) and assigns the corresponding inspection severity to the inspection lot (3). Then, the Quality Technician makes the inspection (4) and the Quality Engineer performs the usage decision (4).

If the Quality Planner has set the indicator Dynamic modification for usage decision in the dynamic modification rule, the system updates the quality level for the current inspection lot only when the usage decision is made (5,6). At this point, the system evaluates the conditions for a change in inspection stage based on the dynamic modification rule. Depending on the results of the current inspection, it determines whether or not the inspection stage change occurs. For example, if you accept the usage decision, the next inspection is less severe or may even be skipped. All other inspection lots that are created before updating the quality level with the usage decision (5,6) use the inspection severity from step (2) in the image.

How to add Inspection Characteristics to the Inspection Plan and Enable Dynamic Modification

In this demonstration, the Quality Planner opens the inspection plan we created in a previous demonstration (Group01, Counter 1) and makes two changes:

  • Adding one additional inspection characteristic in a new operation
  • Enabling dynamic modification of the inspection scope at the inspection lot (that is inspection plan) level

To implement the change, they use the app Change Inspection Plan. After entering the plant and inspection plan group, the system automatically opens the plan with group counter 1 since there is no additional plan in this group.

They add a second inspection operation (Power Input, LED Lamps) which will be performed at work center T-QM301. This operation contains one inspection characteristic (Power Input). Note that, in contrast to the previous demonstration, the Planer opts not to reuse an existing master inspection characteristic. Instead, they choose to use a plan-specific inspection characteristic. This characteristic only exists in this inspection plan and cannot be reused in other plans.

The characteristic has the following properties:

  • Type: Quantitative
  • Short text: Power Input
  • Lower/Upper specification limit: 1.00 .. 20.00 W
  • Single result recording: The Quality Technician provides single results for each inspected sample. The system then automatically calculates the average value, standard deviation, and number of units above/below the specified limits. Depending on the settings in the sampling procedure, the system valuates the characteristic accordingly (for example by counting the number of defective units or comparing the average power consumption of all samples to the limits).
  • Documentation if rejected: If the characteristic was rejected, the Quality Technician must provide additional information in short/longtext format.

To modify the inspection scope on the header level of the inspection task list, the Planner opens the plan in the app Change Inspection Plan again. They navigate to the details of the header. In section Parameters for Dynamic Modification, they choose the dynamic modification level Inspection Lot Level. With this setting, all lots using this plan will have one common quality level. To define the rules for inspection stage change, they assign the modification rule B01 which we defined previously. You might remember that the rule has three stages (Normal, reduced, and skip inspection stage).

Reference Operation Set

So far, you've learned that the inspection plan is a complex object with multiple operations and inspection characteristics. Is there a way to standardize quality inspections if, for example, you perform the same inspection operation for multiple materials but you cannot assign the materials to the same inspection plan? The following image shows how the Quality Planner can do this:

The image shows an example of an inspection plan that uses a reference operation set. All operations from the reference operation set are referenced in the inspection plan. For more information, refer to the following text.

In the example, the Quality Planner has defined an inspection plan for goods receipt inspection of lamps as an example. This plan includes two specific operations: Functional Test and Electrical Test, which are unique to the purchased lamps. However, the operations Packaging and Documentation, along with their inspection characteristics, work centers, and test equipment, are generic and identical across multiple inspection plans.

To avoid duplicating the operations Packaging and Documentation in each inspection plan, the Quality Planner has decided to define them in a generic object called Reference Operation Set. When creating specific inspection plans, these plans can reference the Reference Operation Set, and the system will automatically include all the content from the Reference Operation Set into the specific plan.

Technically, the Reference Operation Set is a special type of plan that has the same structure as an inspection plan. It can have multiple operations, each containing several inspection characteristics. Work centers and production resources and tools (PRTs) can be assigned to the reference operations. However, the Reference Operation Set is not dependent on any specific material.

Whenever the Quality Planner makes changes to the Reference Operation Set, any inspection plans that reference it will be automatically updated.

Hint

Expert tip: You can also link a reference operation set to an inspection plan and then unlink it. This allows you to use the reference operation set as a predefined building block for your inspection plan and make specific changes as needed.

When you unlink the reference, any changes you make in the inspection plan will not be transferred back to the reference operation set.

For more information and a demonstration, refer to this e-learning module.

Further Streamlining the Maintenance of an Inspection Plan

This chapter will discuss two additional features in SAP S/4HANA that optimize the number of inspection plans in the system and facilitate the creation of inspection plans: dependent characteristic specifications and copying inspection characteristics from one plan to another.

Dependent Characteristic Specifications in the Inspection Plan

Let's start with dependent characteristic specifications. The goal is to reduce the number of inspection plans in the system by assigning multiple materials to one inspection plan. Normally, this is only possible if all materials assigned to one inspection plan have the same quality inspection. This means that all operations, qualitative and quantitative characteristics, as well as their specified limits, must be identical. However, if even one material slightly differs, for example, due to a difference in one quantitative characteristic, it must have its own specific inspection plan. This is illustrated in the following image:

The image illustrates two materials, such as metal sheets, each with its own inspection plan. Although the materials are identical, they differ in one characteristic, such as a borehole. For more detailed information, please refer to the text below.

The image illustrates two identical metal sheets in terms of size and composition, except for one borehole that has a different size. Each borehole needs to be measured and corresponds to an inspection characteristic in the plan. As a result of this difference, each material has its own inspection plan, even though the two materials are otherwise identical, except for the borehole in the lower right corner.

To simplify this situation, the Quality Planner creates a single inspection plan and includes both materials in the header of the plan. Each borehole still corresponds to an inspection characteristic in the plan, resulting in a total of five inspection characteristics (since the metal sheet has five boreholes). For the borehole in the upper part of the metal sheet (shown in black), the Planner sets a target value of 6 mm with a tolerance of ±0.20 mm. For the borehole in the lower right part of the metal sheet (shown in red), the Planner establishes a dependent characteristic specification:

  • Material 1234-8: 8 mm ±0.25 mm
  • Material 1234-10: 10 mm ±0.3 mm

This is shown in the following figure:

The image provides an example of an inspection operation within an inspection plan. Characteristics 1 to 4 have specifications that are not dependent on the material being inspected. On the other hand, characteristic 5 has specifications that vary depending on the material being inspected. For more detailed information, please refer to the accompanying text.

As mentioned earlier, the characteristic values for measurements 1..4 are independent of the material and have a target value of 6.00 mm. However, the characteristic value for measurement 5 varies depending on the material being inspected. For material 1234-8, the target value is 8.00 mm, while for material 1234-10, the target value is 10.00 mm. When the system creates the inspection lot and selects this plan, it checks the material in the inspection lot header and chooses the corresponding dependent characteristic specification.

To maintain dependent characteristic specifications for the task list, the Quality Planner uses the app Change Inspection Plan. They first assign all materials to the task list header. Then, they proceed to the inspection characteristic overview screen, where an icon indicates the presence of dependent characteristic specifications.

In addition to material-specific dependent characteristic specifications, the Planner can also define dependent characteristic specifications for quantitative and qualitative inspection characteristics based on the following:

  • Combination of material and supplier

  • Combination of material and customer

  • Combination of material and manufacturer

    In this case, the manufacturer is maintained as a supplier business partner.

If dependent characteristic specifications have not been defined, the system will use the values defined for the inspection characteristic.

Note

You cannot define dependent characteristic specifications for referenced master inspection characteristics or inspection characteristics in reference operation sets.

For more information, refer to the Application Documentation.

Copying Inspection Characteristics

When maintaining or updating an inspection plan, the Quality Planner can easily copy inspection characteristics from an existing plan instead of starting from scratch. This approach saves time and effort. Here's an example:

When maintaining an inspection plan, you can copy characteristics from an existing plan. First, select Copy Characteristics and choose the source plan. The system will then display all the characteristics in the source plan, and you can select the ones you want to copy.

For example, let's say the inspection plan already has three characteristics: diameter, surface, and color. The Quality Planner wants to add two more characteristics: length and height. Instead of creating them from scratch, they can simply copy these characteristics from another plan that already includes them. This saves time and ensures consistency.

To copy characteristics, the Quality Planner selects the Copy Characteristics function (Step 1). They then choose the source plan from which they want to copy the characteristics. The system displays all the characteristics in the source plan, and the Planner can select the ones they want to copy (Step 3). After confirming their selection, the system adds the chosen characteristics to the target plan (Step 4). It's important to note that the new characteristics are added after the one that was selected when the copy function was triggered.

By following this process, the Quality Planner can efficiently maintain and update inspection plans without having to start from scratch each time.

Hint

You can copy an inspection characteristic from another operation in the task list or from another task list. If you copy inspection characteristics from another task list, the information is read from the database.

When you copy inspection characteristics within the same task list or from other task lists, the code groups and selected sets are copied to the current task list in addition to the maintained quantitative data.

Dependent characteristic specifications are not copied. You can copy the independent specifications and then manually maintain the dependent characteristic specifications.

How to Enhance an Inspection Plan: Reference Operation Set and Material - Task List Assignment

In the following demonstration, the Quality Planner performs multiple steps:

  1. Change an existing inspection plan using the app Change Inspection Plan and adds an operation from another plan as reference.

    In detail, the Quality Planner opens the inspection plan GROUP02 in plant 1010 and adds the reference inspection plan QM06-99 (which contains a visual inspection and an inspection of the label) to the inspection plan. By doing this, the system references all operations from the standard plan into the specific inspection plan.

  2. Add multiple materials to one inspection plan using the app Manage Inspection Plans.

    In detail, the Quality Planner opens the inspection plan QM02-07 in the app Manage Inspection Plans. After switching to edit mode, they assign a list of materials (T-F102, T-F202, T-F303, …, T-FL02) to the inspection plan header. As a consequence, the system will use this plan when a goods receipt inspection for these materials is performed.

  3. Use the app Change Inspection Plan to define dependent characteristic specifications for the individual materials.

    In detail, the Quality Planner uses the app Change Inspection Plan, opens the plan changed in the previous step, and adds two additional materials to the plan header (T-BQ102 and T-BQ202). They then proceed to inspection operation 20 (Measuring Power Input) and maintain material-specific specifications for the two materials for the inspection characteristic Power Input. Material T-BQ102 is a 6W LED lamp, whereas material T-BQ202 is a 5W LED lamp. The Quality Planner adapts the target values for upper and lower tolerance and the target value accordingly ( 5 W ± 0.1 W and 6W ± 0.2 W).

  4. Change the inspection setup in the material master and enable using an inspection plan instead of a material specification.

    In detail, the Quality Planner opens the material master of the LED Lamp material T-BQ102, proceeds to the QM view and opens the detailed settings of inspection type 05 (Inspection for other goods receipt). So far, other goods receipt inspections used only a material specification. As of now, the inspection plan changed in the previous steps shall be used for this business process. Therefore, the Quality Planner disables the indicator Inspect with Material Specification and instead sets the indicator Inspect with Task List.

  5. Create a manual inspection lot.

    To test the new inspection plan, the Quality Planner creates an additional inspection lot for inspection type 05 using the app Create Inspection Lot. Note that they could also have performed an additional goods receipt in the Post Goods Movement app. After entering the material number (T-BQ102), the plant (1010), the inspection lot origin (05), and the quantity to be inspected (50 PC), the system checks for applicable inspection plans. If only one applies, it immediately adds the plan to the lot. However, in our case, two inspection plans apply to the entered conditions (QM02-02 / 1 and GROUP02 / 1). Therefore, the system raises a pop up where the user must select the desired plan.

    Note that, if the lot would have been created during goods receipt posting, the pop up would not have appeared. Instead, the lot has a respective status, indicating that the assignment of an inspection plan is necessary.

  6. Change the inspection lot by adding a document with additional inspection specifications.

    In detail, the Quality Engineer includes a document info record that contains a technical drawing. This document can be utilized during quality inspections to provide additional information to the Quality Technician. For example, it can specify which parameters should be inspected and what the target values are. By having access to the technical drawing, the Quality Technician can easily identify the specific areas or features that need to be inspected and compare the actual measurements or observations with the target values specified in the document.

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