After the buyer submits an SOW, the status shows as "Pending Supplier Review". This means the SOW is sitting with the supplier, who is in the process of reviewing it. The supplier and buyer review can go back and forth as many times as needed until an agreement is reached with both the characteristics and clause details.
Once that happens, if the buyer has enabled the ability for the supplier to include workers on the SOW, the supplier can begin selecting the workers and adding them to the worker roles that are identified on the SOW.