Question

A production process at Kenneth Day Manufacturing is shown in the figure below. The drilling operation occurs separately from, and simultaneously with the sawing and sanding, which are independent sequential operations. A product needs to go through only one of the three assembly operations (the operations are in parallel). Q 2.5 units/hr Sawing 2.1 units/he Sanding Assembly 0.8 unitsthe Welding 6 units.hr Assembly 0.8 units Drilling 5 unitshe Assembly 0.8 untui is the bottleneck

Answer 1

let consider stage1 is sawing therefore process rate = 2.5 units/hr therefore throughput time = 60/2.5 = 24 minutes

let consider stage2 is sanding and drilling therefore process rate = 5 units/hr + 2.1 units/hr = 7.1 units/hr therefore throughput time = 60/7.1 = 8.45 minutes

let consider stage3 is welding therefore process rate = 6 units/hr therefore throughput time = 60/6 = 10 minutes

let consider stage4 is assembly therefore process rate = (3 * 0.8 = 2.4) units/hr therefore throughput time = 60/2.4 = 25 minutes

since assembly consumes the highest time therefore it is bottleneck stage.

a) Assembly is the bottleneck

b) the bottleneck time is 25 minutes

c) throughput time = time of bottleneck step = 25 minutes

d) if the firm operates 8 hours per day , 20 days per month then monthly capacity

= 8 hour * 60 minutes * 20 days / throughput time

= 9600 / 25

= 384 units