An assembly line consists of three workstations (WS) with each station's activity time as shown. 
The flow time for items on this line would be
Definitions:
Machine-Hours
A measure of production time based on the number of hours machines are operating.
Unused Capacity
Available production or service facilities that are currently not in use or are underutilized.
Predetermined Overhead Rate
A projected rate applied for distributing manufacturing overhead expenses across specific products or job orders.
Machine-Hours
A measure of the total time that manufacturing equipment is operating during a specific period, often used as a basis for allocating manufacturing overhead.
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