OSM Chapter 6

The volume requirements for the product are one determinant of the choice of which process structure to select.

TRUE

You have just determined the actual number of workstations that will be used on an assembly line to be 6 using the assembly-line balancing procedure. The cycle time of the line is 5 minutes and the sum of all that tasks required on the line is 25 minutes. Which of the following is the correct value for the resulting line's efficiency? A. 0.500 B. 0.833 C. 0.973 D. 0.990 E. None of these

.833 [25/(6 x 5)] = 0.833

Using the assembly-line balancing procedure, which of the following is the required cycle time if the production time in minutes per day is 1440 and the required output per day in units is 2000? A. 0.72 B. 1.388 C. 250 D. 500 E. Cannot be determined from the information above

0.72 1440/2000=.72

21. Using the assembly-line balancing procedure, which of the following is the theoretical minimum number of workstations if the task times for the six tasks that make up the job are 4, 6, 7, 2, 6, and 5 minutes, and the cycle time is 10 minutes? A. 3 B. 5 C. 6 D. 8 E. None of these Using equation 6.4, (4 + 6 + 7 + 2 + 6 + 5) / 10 = 3.

3 (4 + 6 + 7 + 2 + 6 + 5) / 10 = 3.

Which of these expressions is Little's Law? A. Inventory/Flow time = Throughput rate: B. Inventory/Throughput Rate = Flow time C. Inventory = Throughput rate × Flow time D. Throughput Rate/Inventory = 1/Flow Time E. All of the above

All of the above Inventory/Flow time = Throughput rate: Inventory/Throughput Rate = Flow time Inventory = Throughput rate × Flow time Throughput Rate/Inventory = 1/Flow Time

19. A firm will work with a customer to design the product, and then make it from purchased materials, parts, and components. This firm is called: A. A make to order firm B. An engineer to order firm C. A make to stock firm D. A customer service firm E. An assemble to order firm

An engineer to order firm

13. Which of the following basic types of process structures is one which equipment or work processes are arranged according to the progressive steps by which the product is made? A. Project B. Workcenter C. Manufacturing cell D. Assembly line E. Continuous process

Assembly line

The placement of which of the following is not determined by production process organization decisions? A. Departments B. Workgroups C. Workstations D. Machines E. Emergency exits

Emergency exits

A continuous process indicates production of discrete parts moving from workstation to workstation at a controlled rate.

FALSE:A continuous process is similar to an assembly line in that production follows a predetermined sequence of steps, but the flow is continuous such as with liquids, rather than discrete.

Which of the following is not considered a major work flow structure? A. Work Center B. Project C. Assembly line D. Fabrication E. Continuous Flow

Fabrication

According to Little's Law, which of the following ratios is used to find throughput rate? A. Cycle time/Process time B. Throughput time/Process velocity C. Process velocity/Throughput time D. Inventory /Flow time E. Value added time/Process velocity

Inventory/Flow time

21. In a workcenter, machine A has a ten minute set-up time per batch and a two minute per unit run time. Machine B performs the identical function but has a set-up time of thirty minutes and a one minute run time per unit. The workcenter makes products in batches ranging from one unit to one hundred units. Assuming capacity is not a limitation on either machine, on which batches should machine B be used? A. All batches should be run on machine B B. Batches of more than 20 units should be run on machine B C. Batches of fewer than 80 units should be run on machine B D. Batches with up to 50 units should be run on machine B E. No batches should be run on machine B Let X will be the unit that is indifferent between Machine A and Machine * 10 2X= 30+ 1X Solving this, 2X-1X= 30-10 1X =20.

Machine A: 10 + 2Q. Machine B: 30 + 1Q. Point of indifference is where 10 + 2Q = 30 + Q or Q = 20. Thus, batches of more than 20 units should be run on machine B.

A firm fills its customer's orders from finished goods inventory. It is a: A. Make to order firm B. Engineer to order firm C. Make to stock firm D. Customer service firm E. Assemble to order firm

Make to stock firm

Which of the following is not a basic type of process structure? A. Product-process matrix B. Workcenter C. Manufacturing cell D. Assembly line E. Continuous process

Product-process matrix

When balancing an assembly line, which of the following is not a way to reduce the longest task time below the required workstation cycle time? A. Upgrade the equipment B. Assign a roaming helper to support the line C. Split the task between two workstations D. Speed up the assembly line transfer mechanism E. Use a more skilled worker

Speed up the assembly line transfer mechanism

Process selection refers to the strategic decision of selecting which kind of production processes to use to produce a product or provide a service

TRUE: Process selection refers to the strategic decision of selecting which kind of production processes to use to produce a product or provide a service.

10. A difference between project and continuous flow categories of process flow structures is which two of the following? A. The size and bulk of the product B. Discrete parts moving from workstation to workstation C. Degree of equipment specialization D. Being a "Virtual Factory" E. Profit per unit

The size and bulk of the product

17. According to Little's Law, which of the following can be used to estimate work-in-process inventory? A. Process time/Cycle time B. Throughput rate times Flow time C. Process velocity/Flow time D. Set up time/Throughput rate E. Value added time/Process velocity

Throughput rate times Flow time

13. Which of the following basic types of process structures is one which similar equipment or functions are grouped together? A. Project B. Workcenter C. Manufacturing cell D. Assembly line E. Continuous process

Workcenter

Which of the following is a basic type of process structure? A. Process flow diagram B. Product matrix C. Process matrix D. Workcenter E. Manual assembly

Workcenter

You have just determined the actual number of workstations that will be used on an assembly line to be 8 using the assembly-line balancing procedure. The cycle time of the line is 10 minutes and the sum of all that tasks required on the line is 60 minutes. Which of the following is the correct value for the resulting line's efficiency? A. 0.500 B. 0.650 C. 0.750 D. 0.850 E. None of these

0.750 (8x10)/60

1Using the assembly-line balancing procedure, which of the following is the theoretical minimum number of workstations if the task times for the six tasks that make up the job are 4, 6, 7, 2, 6, and 5 minutes, and the cycle time is 10 minutes? A. 3 B. 5 C. 6 D. 8 E. None of these

3 (4 + 6 + 7 + 2 + 6 + 5)/10 = 3.

Using the assembly-line balancing procedure, which of the following is the theoretical minimum number of workstations if the task times for the eight tasks that make up the job are 7, 4, 7, 8, 9, 4, 3, and 6 minutes, and the cycle time is 8 minutes? A. 3 B. 5 C. 6 D. 8 E. None of these

6 (7 + 4 + 7 + 8 + 9 + 4 + 3 + 6)/8 = 6

Which of the following is not a step in developing a manufacturing cell layout? A. Grouping parts into families that follow a common sequence of steps B. Identifying dominant flow patterns of parts families as a basis for location of processes C. Physically grouping machines and processes into cells D. Disposing of left-over machinery and outsourcing ungrouped processes E. None of the above

Disposing of left-over machinery and outsourcing ungrouped processes

Using the assembly-line balancing procedure, which of the following is the required cycle time in minutes per unit if the daily production time is 480 minutes and the required daily output is 50 units? A. 0.104 B. 50 C. 9.6 D. 480 E. Cannot be determined from the information above

9.6 480/5=9.6