Robustness is a key issue when deciding upon your using a \"Pull\" vs a \"Push\"

Question

Robustness is a key issue when deciding upon your using a "Pull" vs a "Push" production control system. Identify the solid-line profit function as either "push" or "pull" and the dashed-line profit function as either "push" or "pull." (In other words which one is which?). The optimum control point is shown on the x-axis as a percentage of optimal. When you are at 100% optimum for push what is the setting (WIP or TH)? And, when you are at 100% optimum for pull what is the setting (WIP or TH)? Use this graph to explain which is more robust (CONWIP/pull or push) for setting the optimum control value of WIP or TH and why?

Explanation / Answer

(a) solid line profit function is pull production control system,because Make to order is pull production control where inventory is minimum & there is no negative profit & iin solid line there is no negative.in pull production ,wastage is less so there are following Just -in -time(JIT).ex.TOYATA

Dash line is Push production control systsem, because Make to stock is push production control, where invrntory is more & might be negative profit.since in dash line , there is negative profit so it is Push production.Ex.apparel in Reatail shop

(b) for push system

TH=(w/4+w)=55/(4+55)=0.93

wip=5*(TH/1-TH)=5*(0.93/1-0.93)=66.4

For pull

TH=60/(4+60)=0.93

WIP=5*(0.93/1-0.93)=66.4

(3)

robustness is a function of profit

since pull has more profit than push system so Pull system is more robust

  

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