OPMA CHP 6
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?
Assembly line
Which of the following is NOT a way to reduce the required time for a task? A. Product Redesign B. Share the task among several workstations C. Work overtime D. Use a less skilled worked
D. use a less skilled worker
The placement of which of the following is not determined by production process organization decisions?
Emergency exits
Which layout allocates dissimilar machines into cells to work on products that have similar shapes and processing requirements?
Manufacturing cell layout
The _______ - ______ matrix shows when difference production process types are used in relation to product volume and standardization
Product-Process
Which of the following is not a basic type of process structure
Product-process matrix
A map showing the flow of materials through a manufacturing system is known as ______ ____ map
Production Process
Which of the following equations is correct for calculating the required workstation cycle time?
Production time per day / Required output per day (in units)
Which of the following basic types of process structures is one which similar equipment or functions are grouped together?
work center
Which of the following is a basic type of process structure
work-center
The efficiency of an assembly-line balance must always be less than or equal to____?
ONE
Identify the true statements about assembly-line and continuous process layouts
- In a continuous process, a product moves continuously through the process - Often, the item being produced in a continous process is a liquid or chemical that actually flows through the system. - In an assembly line, a product goes through a progressive set of steps.6
What are the 4 types of firms?
1. Make-to-stock 2. Assemble-to-order 3. Make-to-order 4. Engineer-to-order
Rank the production process layouts from lowest-to highest-volume
1. Project 2. Workcenter 3. Manufacturing Cell 4. Assembly Line
Sort the steps associated with making a product into their order
1. Sourcing 2. Making 3. Delivering
A computer manufacturer offers 3 types of hard disk drive, 2 types of monitor, 4 types of battery and 5 choice of operating system. How many total combinations are possible using these choices?
120 (3 * 2 * 4 * 5)
Last year a firm had an average inventory of $1,500,000 and the Cost of goods sold was $3,750,000. What was the days-of-supply last year?
146 [(Avg. Inventory / COGS) * 365]
There are ___ dimensions depicted on a product- process matrix
2
An assembly line must produce 1,000 units in an 8hr day. Assuming the line operates continuously, what is the required workstation cycle time?
28.8secs (8 * 60 * 60/ 1000)
If the sum of all task times is 100 seconds and the required cycle time is 21 seconds, what is the theoretical minimum # of workstation?
5 (sum of task times/ required cycle time) ( 100/21= 4.76; round up up to 5)
For an assembly line system with 6 workstations, the cycle time is 27 seconds and the sum of task times is 120 seconds. What is the efficiency of this balance?
74.1 (Efficiency = Sum of task times / Actual # of workstations * Workstation cycle time)
Workcenters (Job shop) with large amount of interdepartmental traffic are often placed?
Adjacent to each other
Which of the following products would use a project layout? A. Bridge B. Laptop C. Mass Produced Toy D. Automibile
Bridge
When discussing and assembly line, there are differences among line types that include all of the following EXCEPT? A. material handling devices B. workstation characteristics C. systematic planning D. Length of the line
C. Systematic planning
A manufacturing cell is generally made up of ____________ machines
Dissimilar
The total work at a workstation is equal to the sum of all tasks to complete a product T/F
False
A ________ line layout can increase opportunities for work sharing among workstations in an assembly line.
Flexible
According to Little's Law, which of the following ratios is used to find throughput rate?
Inventory/flow time
Little's Law relates inventory, throughput rate, and flow time as...
Inventory= Throughput Rate * Flow Time
The time needed to respond to a customer order is called the
Lead time
The practice of achieving high levels of customer service with a minimal inventory investment is known as ______ manufacturing
Lean
Which type of firm invests in lean manufacturing programs in order to improve customer service levels for a given inventory investment?
Make-to-Stock
A __________ ______ layout groups dissimilar machines to work on products that have similar processing requirements
Manufacturing Cell
Which of the following is NOT a benefit of a cellular layout? A. better human relations B. More in-process inventory C. Improved operator expertise D. Faster production setup
More in-process inventory
Workcenters are often focused on
One type of operation
Lead time is the time needed to respond to a customer ______?
Order
The _______ relationship describes the order in which tasks must be completed
Precedence
The calculated theoretical number of workstations should be __________________
Rounded up to the next highest integer.
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?
Speed up the assembly line transfer mechanism
A difference between project and continuous flow categories of process flow structures is which two of the following?
The size and bulk of the product
Inventory is positioned at the customer order decoupling point to allow?
The supply chain to operate independently
According to Little's law, which of the following can be used to estimate work-in-process inventory?
Throughput rate times flow time
A production process map is built by
Tracking the flow of material through the system
Carrying finished goods inventory is more expensive than carrying raw material inventory? T/F
True
In a ________ layout machines are grouped according to type or function and parts travel to the appropriate location for processing.
Workcenter
The time between successive units coming off the end of an assembly line is referred to as:
Workstation cycle time
Days of supply
average inventory divided by COGS * 365
Which of the following is not a step in developing a manufacturing cell layout?
disposing of left-over machinery and outsourcing ungrouped processes
Which of the following is not considered a major work flow structure?
fabrication
Firms that service customers from finished goods inventory are known as which of the following?
make-to-stock
In a project layout, _____ and ______ are arranged around the production point.
materials and equipments
Inventory Turn
the cost of goods sold divided by the average inventory value
Total average value of inventory
the sum of the value (at cost) of the raw material, work-in process, and finished goods inventory
When parts are moved on a conveyor that passes a series of workstations in a uniform time interval, this is called the_________
workstation cycle time
