Change history functionality plays an important supporting role in the planning process. In sales and operations planning, there are several plans that can be used in the planning process, such as the sales plan, marketing plan, demand plan, finance plan, and so on. To create a consensus plan, it is important to understand the changes in the single plans, for example where those changes originate from and why they were made. The change history enables tracking of the changes that have been made to key figure values. It gives related information about changes, for example the user who made the change, and it also allows you to analyze those changes.
With the change history, changes to stored key figures that have been enabled for the change history can be tracked, and the effect of those changes on dependent calculated key figures can be viewed. The system tracks which data is changed, when it was changed and by whom, reason codes, comments, and before and after values.
Change history tracks interactive and non-interactive changes from various sources of change. Interactive changes are defined as changes that any time a user makes manual changes to key figure data in the planning view and confirms it by saving the data, the changes are captured by the change history. These changes are called "original changes".
Some examples of interactive and non-interactive changes are the following:
Data load (using SAP Cloud Platform Integration for data services, OData service, and via Data Integration Jobs app)
Interactive changes in SAP Integrated Business Planning, add-in for Microsoft Excel, in the Web-based Planning app, in the Planner Workspaces app, and in Driver-Based Planning app
Statistical forecast
Copy Operators
Version Copy
Realignment
Snapshots
Data Captured
Modified by user
Modified date
Modified value
Attributes
Key figures
Time periods
Reason code
Comment
Enabling the change history includes several steps.
Firstly, we need to enable change history in the planning area, as shown in the figure, Change History Settings.

Here, the setting indicates that change history management is enabled/allowed for the planning area shown. This is a broader setting that has to be created.
After that, you also need to enable stored key figures for which you want to track the change history for the change history

It is recommended to enable change history only for key essential data, as the amount of records generated interactively can be very high and might have an impact on the system performance.
The last step in change history enablement relates to the business users. They need to have permissions to access the different change history views.
Changes Captured from SAP Integrated Business Planning, add-in for Microsoft Excel
When a change is made in the Excel UI, a reason code may be specified at the time of saving. This change, along with the reason code, is tracked in change history. It is possible to extract change history data from SAP Integrated Business Planning for Supply Chain using the new OData v2 service /IBP/API_CHANGEHISTORY_READ_SRV, and integrate this information in an external monitoring tool. For example, the complete set of changes from a particular planning cycle can be extracted for analysis in a reporting or analytical tool, while keeping the amount of data remaining in SAP IBP to a minimum
View Change History


Change history can be viewed within the Excel UI, using an option when creating as New View, as shown in the previous two figures.