scope:

Abstract:

Constraints, or the identification of a precedence order for work procedures, are crucial to flight hardware processing. A constraints system has been in place for many years in the Shuttle Program. However, when a new electronic work control system was brought online for Ares I-X processing, a robust and automated way of controlling constraints was not provided. As a result, several constraints were missed, and this drove the need to rework constraints, such as opening a closed-out area back up to complete work that was missed. This can even become a safety issue. A system must be put in place when new work control systems are brought online for the identification of a precedence order for work procedures.