Hi Mariya,
Let me provide some inputs pointing towards the SAP ASAP roadmap and to some external link which can compliment the templates I have suggested.
**Confined to the Blueprint sign-off criteria**
1. Quality of the To-be process documentation - Completeness will depend on the level of details available as to the process is supported by SAP standard or if a WRICEF is required. If WRICEF is required the Functional Specification need to be complete in terms of the information captured. Clarity on the Measure of success, Scope of the process - what is included and what is not included should be very clear. Supporting Visualization tools like iRise can ensure further completeness of the To-be process documentation.
The To-be Process documentation templates will surely help you to define a tracker - Process Requirements Template, Business Process Description Template under Detailed Design - Business Process #1 - n
2. Ensure that the to-be process is closest to SAP best practices. Meaning least development requirements, if the process needs to be fine tuned or modified to bring it closer to SAP standards that will increase the ability to be realized. If there are development requirements there should be clarity on the ability to realize the additional requirements in terms of Complexity matrix.
3. Prioritization of WRICEF requirements in terms of which one are MoSCoW - must, should, could, would have will be helpful when you sign-off on the blueprint. This allows flexibility to prioritize could/would requirements based on progress.
4. You may also refer to a reference website like KPI library for benchmarking the industry performance indicators and use them for "Correctness" of your realized process. http://kpilibrary.com/
BBP Phase sign-off also requires the following Legacy data migration & archive, Techincal solution design, Dev environment etc...as you can see in the ASAP breakdown of the phase to be completed & likewise signedoff.
https://websmp107.sap-ag.de/~sapidb/011000358700000661042013E/Index.htm
Warm Regards,
Ranjith Raghunathan