Final answer:
The window manufacturer's pay system is a productivity-based pay system where installers receive a base wage plus an extra $25 for each job completed to specifications.
Step-by-step explanation:
The window manufacturer's pay system of providing a base wage plus an extra $25 for each job completed to specifications is an example of a productivity-based pay system. This type of pay system rewards employees based on their level of productivity or output. In this case, the extra $25 acts as an incentive for installers to complete jobs to specifications and increase their productivity.