Disposition
A decision made with respect to some formally identified, formally managed issue. The issue can be any of many forms (e.g., Review Item Discrepancy or Non-Conformance).
Limited Use
An MRB disposition that approves a Serial Number or Lot Number of an item for use that is more restrictive than the Development Requirements stipulate. For example, a marginally performing part might be limited for use as Test Support Equipment, for non-combat conditions, or for a restricted number of operational hours. Limited Use items require... read more
Material Review Board (MRB)
An MRB is a formally chartered group of people empowered to supersede or direct the change of certain aspects of published Engineering during production. The MRB concept is important to SE because under certain circumstances, the board members can authorize temporary or limited invalidation of qualification data. The process is not normally tied to the... read more
Repair
An MRB disposition for discrepant hardware resulting in a Serial Number that is no longer compliant with the released identifying drawing. Therefore, technically constituting a unique Part Number, usually comprised of the original Part Number plus the number of the directing non-conformance. Repair can be associated with limited use. Contrast with rework. The notion of... read more
Rework
An MRB disposition for discrepant hardware resulting in a Serial Number that is compliant with the released identifying drawing. Contrast with repair, which can cause additional work for the attentive System Engineer.
Scrap
An MRB disposition that formally precludes a Serial Number from any operational use. Usually involves physical alteration of the discrepant item (e.g., painting, part marking or otherwise disfiguring up to and including outright destruction) that irrevocably differentiates it from items accepted as complying with the requirements of the identifying drawing. Special cases include “scrap to... read more
Use As-Is
An MRB disposition where the non-conformant article is determine acceptable for use even though it is not in compliance with the identifying drawing. This disposition literally appends the NC number to the P/N, such that the article is uniquely identified. During rate production, this disposition can be horrendously expensive, because none of the support documentation... read more