Meaning
Takt time and customer demand schedules provide the benchmarks for evaluating the efficiency of a manufacturing sequence. A line throughput constraint identifies the specific station or process where the cycle time exceeds the pace demanded by the customer.
Process Bottleneck
The slowest machine or manual task in the chain determines the maximum speed of the entire production line. Analyzing a line throughput constraint involves measuring the cycle time of every individual operation to find the longest duration. Improving any other station will not increase the total number of units produced until the bottleneck is addressed.
Production Balance
Distributing the workload evenly across all stations minimizes the idle time of the operators and the machines. When a line throughput constraint is removed, another station often becomes the new limiting factor. This iterative process of balancing the line ensures that resources are used as effectively as possible.
Revenue Consequence
Failing to meet the daily production target leads to late deliveries and potential penalties from the customer. A line throughput constraint directly limits the amount of income the plant can generate each day. Managers invest in faster equipment or additional shifts specifically to target these bottlenecks and increase profitability.
Calculations for the return on investment for new machinery depend entirely on how much extra volume the factory can sell once the restriction is lifted. Adding capacity to a non bottleneck station is generally a waste of capital.
