Final answer:
The project manager should communicate the delay in the DSS release transparently, explaining the efficiency concerns, recognizing the team's efforts, and discussing the importance of resolving issues to meet customer needs.
Step-by-step explanation:
When addressing the team about the delay in the release of the bank's new decision support system (DSS) due to efficiency concerns, the project manager should be transparent and informative. It's important to provide clear timelines and explain the reasons for the delay, which might be due to poor design decisions made early in the process or political pressure affecting bank operations. Additionally, the project manager should acknowledge the team's hard work and the difficulties imposed by having to balance multiple projects, especially when regular work programs are at risk of losing funding. The manager should encourage the team to focus on resolving the efficiency issues to ensure the final product meets customer needs effectively.