Cost per unit of production (CPP) is affected by which of the following?

Cost per unit of production (CPP) is indeed influenced significantly by the amount of time required to complete the work relative to equipment costs. This relationship arises because equipment typically incurs fixed costs that must be allocated over the units of production. If a project takes longer than anticipated, these costs are spread over fewer units, thus increasing the cost per unit.

Time also directly correlates with labor costs, as extended durations may require additional labor hours, further contributing to the total cost. Consequently, the efficiency and time management of a project are pivotal elements in determining CPP. Adjustments in scheduling, resource allocation, and equipment utilization can therefore lead to substantial impacts on the overall cost efficiency of production.

The other factors mentioned do contribute to overall project costs, but they do not have as immediate an impact on CPP. For example, while the volume of materials used can affect total expenses, it doesn't directly change the per unit cost unless it leads to significant wastage or inefficiencies. Similarly, the type of labor used may influence productivity and costs, yet it is the time taken that typically creates the most considerable variation in CPP. Weather conditions can indeed affect productivity and project timelines but are generally considered external variables that impact overall project schedules rather than a direct adjustment in CPP calculation.