Question

Mass production systems are best scheduled with a) PERT/CPM b) sequencing rules c) linear programming d) line balancing . In the bill of material shown below, how many D's are required to make one A? (Hint: draw the product structure diagram) Level Item Qty 2 4 2 a) 5 b) 6 c) 12 d) 14 40. The SPT sequencing rule is most useful when subcontracting is anticipated. a) b) the shop is highly congested. only small tardiness values can be tolerated. jobs have to be assembled with other jobs at a later date. c) d) 41. In lean production, continuous improvement goes by the name a) Poka-yoke b) Kaizen c) 5S d) Jidoka 2. Suppliers to a lean production system typically Have short term contracts that are subject to frequent quality checks Deliver products or components monthly Are located anywhere in the world Synchronize their production and sequence their delivery a) b) c) d)

Answer 1

38 B) Sequencing rules –

Mass production manufactures goods in huge quantities with a defined process so that the goods are same. The process involves a sequence of activities.

39 A) 5 – 1 A needs à2B(-1)à3D(-2)à2D(--2)

40 B) SPT means shortest processing time. It is a sequencing which states that the job requiring the shortest processing time is to be processed first.

41 B) Kaizen is used in lean production. It is a continuous process improvement mechanism which focuses on eliminating waste and improving productivity

42 D). The suppliers need to make frequent delivers because Lean production aims at high volume production using minimal raw material, WIP, finished goods. (it’s also referred as Just in time )