Question

The following represents a process used to assemble a chair with an upholstered seat. stationsa, b, and c make the seat; stations j, k, and l assemble the chair frame; station x is wherethe two subassemblies are brought together; and some fi nal tasks are completed in stations yand z. one worker is assigned to each of the stations. generally, no inventory is kept anywherein the system, although there is room for one unit between each of the stations that might beused for a brief amount of time.bcakljx y zgiven the following amount of work in seconds required at each station:a 38 j 32 x 22b4. the following represents a process used to assemble a chair with an upholstered seat. stationsa, b, and c make the seat; stations j, k, and l assemble the chair frame; station x is wherethe two subassemblies are brought together; and some fi nal tasks are completed in stations yand z. one worker is assigned to each of the stations. generally, no inventory is kept anywherein the system, although the

Answer 1

There are three questions here:

A. The possible daily output of this process if there is 8 processing time each day?

the time it takes to assemble a chair in seconds = A + B + C + J + K + L + X + Y + Z  

which is equal to = 38 + 34 + 35 + 32 + 30 + 34 + 22 + 18 + 20 =263 per chair

Processing hours = 8 hours x 60 minutes x 60 seconds

= 8 x 60 x 60

= 480 x 60 = 28,800 seconds is available in an 8 hr day.

28,800 / 263 =109.5057034220532

Therefore, It is possible to make 109 chairs in an 8 hour day.

B. Given your output rate in above, what is the efficiency of the process?

The time it takes to assemble a chair in seconds = A+ B + C + J + K + L + X + Y + Z.

= 34 + 34 + 34 + 30 + 30 + 30 + 22 + 18 + 20 = 252.6315789473684 per chair

A total of 252 per chair

Processing hours = 8 hours x 60 minutes x 60 seconds

= 8 x 60 x 60

= 480 x 60 = 28,800 seconds is available in an 8 hour day

= 28,000 / 252 = 114.2857142857143114 chairs

= 109/114 x 100 = 95.6140350877193

Therefore, the efficiency of making the chair is 95.61%

C. What is the flow time of the process?

Flow time is the period that it takes a completed chair to flow through the process from the beginning assemblage step to the last step. Take note that ABC and JKL are parallel legs in the process, and as a result both do not include to flow time to the procedure. In addition, Flow time comprises both pass time and run time at each position in the procedure.