Which of the following might be included in a sustainment program?

In the context of a sustainment program, the inclusion of re-engineering is particularly relevant because it focuses on enhancing and optimizing existing systems to improve performance, extend life, and adjust to new requirements without full redesign or replacement. Re-engineering involves analyzing and rebuilding certain aspects of the system to ensure it can continue to meet operational needs and adapt to environmental or technological changes.

Market analysis, while important in other contexts, typically relates to understanding conditions for new products or modifications rather than the direct support of existing systems within a sustainment program. Research and development of new systems involves creating new solutions rather than sustaining what is currently in place. Project management training, while beneficial for enhancing skills among team members, does not directly contribute to the objectives of sustaining an existing system; the focus is more on improving processes and outcomes through knowledge rather than on the systems themselves.

Thus, re-engineering stands out as a critical activity in sustainment to ensure current systems remain viable and effective over their intended lifespan, addressing usability, performance, and technological advancements.