Final answer:
Reprogramming of man hours for each shop may be required due to reasons such as the increase in automation, productivity improvements, and external economic factors, all of which influence the workforce and job market.
Step-by-step explanation:
Reprogramming of the available man hours for each shop may be required for several reasons which impact the workforce and job market. One such reason is automation, where technology takes over tasks previously done by humans. This can lead to reduced need for human labor in tasks such as bookkeeping, clerical work, and repetitive tasks on assembly lines, thereby necessitating the reallocation of man hours.
A factor contributing to the changing job market is the productivity improvements in various industries. Furthermore, external economic factors such as a recession or shifts in government policy affecting funding can prompt changes in man hour allocation to align with the available resources and priorities.