A copy machine is available 24 hours a day. On a typical day, the machine produc

Question

A copy machine is available 24 hours a day. On a typical day, the machine produces 90 jobs. Each job takes about 4 minutes on the machine, 2 minutes of which is processing time and 2 minute is setup time (logging in, defining the job). About 19% of the jobs need to be reworked, in which case the set-up time and the processing time have to be repeated. The other time, the equipment is idle. What is the OEE of the equipment? (Round your percentage answer to 1 decimal place.) What is the OEE of the equipment? percent

Explanation / Answer

To be calculated:

Overall equipment effectiveness (OEE)

Given values:

Total available time = 24 hours = 1,440 minutes

Number of jobs in a day = 90

Total job time = 4 minutes

Processing time = 2 minutes

Setup time = 2 minutes

Bad quality jobs = 19%

Good quality jobs = 81%

Solution:

The Overall equipment effectiveness (OEE) is calculated as;

OEE = [(Time taken for one job) x (Total number of jobs) x (Quality of jobs)] / Total time

Putting the known values in the above formula, we get;

OEE = [4 x 90 x (81/100)] / 1440

OEE = 0.2025

OEE = 20.25%

Overall equipment effectiveness (OEE) is 20.2%

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