The tollowing table details the tasks required for Indiana-based Frank Pianki In

Question

The tollowing table details the tasks required for Indiana-based Frank Pianki Industries to manutacture a fully portable industnal vacuum cleaner. The times in the table are in minutes. Demand torecasts indicate a need to operate with a cycle time of 11 minutes Pertormance Predecessors Activity Activity Description Time (m 5.0 A B C D E F G Attach wheels to tub Attach motor to lid Attach battery pack Attach safety cutoff Attach filters Attach lid to tub Assemble attachments 2.8 3.8 3.0 2.0 3.0 A, E D, F, G 3.5 2.0 2.0 H Function test Final inspection J Packin a-b) One of the possible assignment of tasks to workstations is shown correcty in | The efficiency of the assembly line with 3 workstations : | % (enter your response rounded to two dec mal places) c) The goal is to have 100% efficiency. Is this possible? d) The theoretic al minimum number of workstationsround your response up to the next whole number).

Explanation / Answer

a-b) In figure 2,

Time at Workstation 1 = A + B + G = 5 + 1.5 + 3 = 9.5 mins

Time at Workstation 2 = C + D + E = 2.8 + 3.8 + 3 = 9.6 mins

Time at Workstation 3 = F + H + I + J = 2 + 3.5 + 2 + 2 = 9.5 mins

This is the most uniform distribution.

Efficiency = Sum of all tasks / No. of workstations * Cycle time = 28.6 / 3 * 11 = 86.67 %

Hence, Answer is Fig. 2 and 86.67

c)

As we saw in previous part that 86.67% is the best possible efficiency, the answer is No.

d)

No. of workstations = Sum of all tasks / Cycle time = 28.6 / 11 = 2.6

Hence, the answer is 3 (next whole number)

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