Issue 07B-1: The current order constraint in 1232-2002 is difficult to understand and, therefore, difficult to use. The DMC decided to “minimalize” the order constraint to focus only on preconditions and added actions to the model. It is recognized that this minimalist construct is at best suboptimal and possibly “broken.” Unfortunately, timing prevents a new construct being included in the model, and the DMC felt something needed to be there to address ordering. For the next revision, a more expressive and usable order constraint facility needs to be incorporated into the model, replacing the current minimalist construct. One proposal on hand is Log #451.
Status: OPEN Medium Priority
Issue 07C-1: Need to perform a trade study to determine what new services are actually required. This is essential for establishing a usable scope for the service specification. The focus here is for the next revision of the standard. In particular, an examination of higher-order services should be included.
Status: OPEN Medium Priority
Issue 07D-1: These standards (especially AI-ESTATE) are difficult to understand due to the large number of options available to an implementer. It is really important to provide some kind of guidance to the implementer. The hope is that a User's Guide can be put together once the revision has cleared its next ballot.
Status: CLOSED PAR has been approved.
Issue 08A-1: Craig M of NAVAIR suggested several additions to the SIMICA model at the 08-A meeting. One of those suggestions was to add a subtype of Design Model: Obsolescence Model. The question is whether the Obsolescence Model can be used a basis for triggering a maturation event and thereby affecting the Diagnostics Model.
Status: OPEN Low Priority (Need to have meeting with Craig or other stakeholder to determine way forward.)
Issue 08D-02: Carry S., Erol, Alicia, Darryl, Tony A., John S., and Steve B. to document problems, issues, concerns, and/or difficulties in using the AI-ESTATE standard. Information will be used in the development of the User’s Guide document.
Status: OPEN High Priority (John S. and Steve B. part done. Erol E. and Pat K. have become Simon J. who has become Myra T.)
Issue 09B-01: Post-2009 revision of AI-ESTATE to include constructs, facilities, and services to support PHM (especially prognostics). Specific examples that must be covered include gray-scale health and time-to-fail.
Status: OPEN Medium Priority
Issue 09C-01: It is unclear that the subcommittee has the resources, knowledge, background, etc., necessary to standardize on “operational context” for either diagnostics or prognostics. For that matter, given that context is domain specific, we are not sure that it is even possible.
Status: OPEN Low Priority