Marsha Blant plans to build a concrete walkway for his home during his vacation.

Question

Marsha Blant plans to build a concrete walkway for his home during his vacation. The following schedule shows how projecy time will be allocated:
Hours
Purchase Materials 5
Obtain rental equipment 3
Remove sod and level site 10
Build forms for concrete 12
Mix and pour concrete into forms 5
Level concrete and smooth 2
Let dry 22
Remove forms from concrete 1
Return rental tools 1
Clean up 2

a) Identify the value-added activities. How much of the total is value-added time?
b) Identify the non-value-added activities. How much total time is spent performing non-value-added activities?
c) Calculate the manufacturing cycle efficiency.

Explanation / Answer

a) Purchase Materials -5- Value added. Obtain rental equipment - 3- Value added. Remove sod and level site -10- Value added Build forms for concrete - 12- Value added Mix and pour concrete into forms - 5- Value added Level concrete and smooth -2- Value added Let dry -22- Value added Remove forms from concrete -1- Non Value added activity. Return rental tools 1- Non Value added activity Clean up -2- Non Value added activity b) Time spent on non-value added activities - 1+1+2= 4 c ) Manufacturing cycle efficiency : Valued Added Time / Total time = 48/52                                                    = 92.30%

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