Definition
Most simply, productivity is the ratio between output and inputs.
Within a factory, industrial engineers or factory managers and line supervisors measure the number of garments produced by a line of sewing machine operators in a specific time frame. Generally factory works 10 to 12 hours a day. Total production (output pieces) of a line and total worker involved in producing those pieces is required to calculate labor productivity.
Assume that
Total production in day =1800 pieces
Total worker (operator +helpers+iron man) = 55
Working time = 600 minutes (10 hours)
So, worker productivity per 10 hours is =Total pieces produced/ total labor input = (1800/55) Pieces =32.72 pieces.
Worker productivity per hours is =Total pieces produced/( total labor input x Total working hour )
= {1800/(55 x 10)} Pieces =3.27 pieces. It also known as pieces/man hour.
Worker/Labor efficiency
labor efficiency, which is a comparison of the time spent working productively to the total time spent at work. These metrics are appropriate for analyzing and comparing the productivity of a particular production line or factory that turns out specific apparel products. However, comparing productivity levels across products or operating lines can be difficult because the benchmarks
differ from one garment to another. Calculation of labor efficiency is shown below. Consider above data.
SMV of the garment = 8.5
Produced minutes by each worker =(32.72 pieces X 8.5) = 278.12 minutes
Available minutes was =(10 x 60) = 600 minutes
So,Worker / Labor efficiency = (Produced minutes/available minutes) x 100 = (278.12/600)*100 = 46.35%
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