Question

there are three improvements that can be made to improve the performance for a line. which of these is not one of those improvements? build buffers to hold excess inventory at bottlenecks make use of parallel machines in place of single machines at workstations reduce the variability of the processing times to less than that implied by the exponential distribution unbalance the line by adding capacity at a station

Explanation:

Building buffers at bottlenecks helps manage inventory flow, using parallel machines can increase capacity at work - stations, and reducing processing - time variability improves predictability. Unbalancing the line by adding capacity at a station disrupts the smooth operation and is not a performance - improving measure for a line.

Answer:

unbalance the line by adding capacity at a station