Release procedures:
All purchasing documents (internal like PR or external like PO) can be released individually or collectively. Refusal of release is possible only individually, it is not possible collectively,
Purchase requisition:
PRs can be released item-wise or overall. Whether a requisition is to be released on item-wise or overall is determined by the doc type and the release group in the classification. For PRs, two mutually-exclusive release procedures are available:
Without Classification
- Release can be done at Item level only.
- Only Acct assignment category, Material group, Plant & Value fields in the purchasing document can be used as release criteria.
With Classification
- Release can be done at both Item level & header level (overall release).
- In principle, every field in the purchasing document can be used as release criterion i.e. can be used as Characteristics while defining release strategy in customizing.
External purchase documents like PO:
Only With Classification
- Only Header Level release, item-level release not possible
- In principle, every field in the purchasing document can be used as release criterion
Steps to set up a release procedure without classification in Customizing – only for PR
Steps to set up a release procedure with classification in Customizing
sapmadeeasy 