Answer:
a. The contractor seems inefficient in terms of schedule.
Step-by-step explanation:
Schedule Performance Index (SPI) = Budgeted Cost of Work Performed(BCWP ) / Budgeted Cost of Work Scheduled(BCWP)
Schedule Performance Index (SPI) = 6/7
Schedule Performance Index (SPI) = 0.85
So, based on the SPI, the contractor seems inefficient in terms of schedule as the Index is less than 1