PRODUCTION LAYOUT PROBLEM. ABC Corporation is planning to assemble a lawnmower u

Question

PRODUCTION LAYOUT PROBLEM. ABC Corporation is planning to assemble a lawnmower using an assembly line. The following table provides the job elements and their precedence elements and the element times.

1.Draw the precedence diagram of this assembly job. ( See PGS 347-356 13th ed   page 229-232 12th ed of your text book, Exhibit 10 10.610.9 13th ed 7A9,10,11,12 of 12th ed.)

2.If the production requirement for the lawnmower is 500 units per 8 hour shift, what will be the speed of this assembly line?

(Line speed = Time allotted per shift in seconds/no. of units produced per shift)

3.How many work stations will be needed to assemble the desired number of lawn mowers per shift?

ELEMENT PRECEDENCE ELEMENT ELEMENT TIME A none 30 seconds B none 30 seconds C A 20 seconds D B 20 seconds E C,D 30 seconds F E 40 seconds G F 10 seconds

Explanation / Answer

1)

G <- F <- E < - C <- A

<- D < - B

2) 130 seconds to produce first unit

but actually the bottleneck is E which takes 40 seconds

Hence speed is 8 * 3600 / 40 = 720

3) given that the speed is 720, only 1 station is needed

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