MM-PUR-SSP Self-Service Procurement

Hello All,

We are planning to implement shopping cart functionality and wanted to check on the following:

1. Can we use this standalone with ERP or is SRM mandatory ?
2. If it can be used standalone with ERP, can the "catalog" function work over Material Master record ?
3. If SRM is mandatory for catalog, can we still use it by having a simple description search over Material Master ?
4. For ERP standalone deployments, do we need any search engine like TREX ?
5. Does it support services ?
6. On approval does it create a PR or can it create a PO based on an existing contract as well ?

There were some threads on the functionality not being stable, would be great to get some feedback.

Regards,

Parag.