Question 1

2 / 2 pts

A company has 3 workers that each work 8 hour days.  Together the three workers can complete 10 tax returns in a day.  What is the firms labor productivity per hour?

 

  

1.2 returns per hour

 

  

2.4 returns per hour

 

  

0.417 returns per hour

 

  

0.8 returns per hour

 

Productivity = output/ input

 

Question 2

1 / 1 pts

Productivity is expressed as:

  

output plus input

 

  

output minus input

 

  

output times input

 

  

output divided by input

 

  

input divided by output

 

Productivity is the ratio of outputs to inputs.

 

Question 3

1 / 1 pts

Which of the following is not a key step toward improving productivity?

  

developing productivity measures for all operations

 

  

improving the bottleneck operations

 

  

establishing reasonable goals for improvement

 

  

considering incentives to reward workers

 

  

converting bond debt to stock ownership

 

A firm’s productivity is independent of its capital structure.

 

Question 4

2 / 2 pts

A company creates 35 units of a product using 20 hours of labor and 10 sheets of paper.  Labor costs $25/ hour and paper costs $30 per sheet.  Each unit of the product sells for $60.  What is the firm’s multifactor productivity measure for labor and paper?

  

2.625

 

  

1.75

 

  

0.381

 

  

5.25

 

  

1300

 

productivity = value of output/ cost of input

 

Question 5

1 / 1 pts

In the area of product and service design, the acronym CAD refers to:

  

conceptually appropriate design

 

  

computer aided design

 

  

commercial applications design

 

  

competitive advantage design

 

  

completely automated design

 

CAD can increase the productivity of product designers.

 

Question 6

1 / 1 pts

One step that isn’t part of service blueprinting is:

 

Eliminate boundaries for the service and decide on the level of interaction needed

 

Identify and determine the sequence of customer and service actions and interactions

  

Develop time estimates for each phase of the process

 

  

Understand the time variability involved

 

  

Identify potential failure points and develop a plan to minimize them

 

Defining boundaries is a critical part of service blueprinting.

 

Question 7

1 / 1 pts

Applied research has the objective of achieving commercial applications for new ideas.

  

True

 

  

False

 

Applied research is aimed at commercializing basic research.

 

Question 8

1 / 1 pts

The research and development activity which starts after positive research results are available and attempts to turn these results into useful commercial applications is:

  

basic research

 

  

applied research

 

  

development

 

  

redesign

 

  

commercial research

 

Development is the conversion of applied research into useful commercial applications.

 

Question 9

1 / 1 pts

The term ‘standardization’ is closely associated with:

  

customization

 

  

high cost

 

  

longer lead times

 

  

variety

 

  

interchangeability

 

Modular designs depend on standardized parts that are interchangeable.

 

Question 10

1 / 1 pts

A ‘House of Quality’ is achieved when no department in a single location has more than 15% rejects.

  

True

 

  

False

 

The house of quality is a means of integrating the voice of the customer into the product or service development process.

 

Question 11

1 / 1 pts

Concurrent Engineering is another term for sequential development.

  

True

 

  

False

 

Concurrent engineering involves simultaneous product and production development.

 

Question 12

1 / 1 pts

Product failures can be easier to remedy with modular design.

  

True

 

  

False

 

Modular designs make it easy to change only portions of the design.

 

Question 13

1 / 1 pts

Which one of the following is not a factor of successful product and service design?

  

be aware of what the competitors are doing

 

  

be aware of what customers want

 

  

know what government regulations are

 

  

use computerized design techniques

 

  

know what new technologies are available

 

Computerized design techniques don’t necessarily lead to successful product and service design.

 

Question 14

1 / 1 pts

Delayed differentiation and modular design are tactics for mass customization.

  

True

 

  

False

 

These allow variety without giving up too much in the way of standardization.

 

Question 15

1 / 1 pts

The structural approach for integrating customer requirements into every aspect of product development is known as:

  

total quality management

 

  

customer satisfaction

 

  

quality function deployment

 

  

customer integration

 

  

a product development team

 

Quality Function Deployment brings the voice of the customer into the product development process.

 

Question 16

1 / 1 pts

Robust design describes a product that will perform satisfactorily so long as it is used in a very narrow range of conditions.

  

True

 

  

False

 

Robust designs perform satisfactorily across a wide range of conditions.

 

Question 17

1 / 1 pts

Incorporating design for disassembly (DFD) principles in product design helps firms with ___________ design issues.

  

Legal

 

  

Social

 

  

Re-use

 

  

Reverse engineering

 

  

Re-engineering

 

Refurbished products must first be disassembled.

 

Question 18

1 / 1 pts

The process of dismantling and inspecting a competitor’s product to discover product improvement is called benchmarking.

  

True

 

  

False

 

Dismantling and inspecting a competitor’s product to discover product improvement is called reverse engineering.



 

Question 1

3 / 3 pts

  
 
The critical path for the network shown is:

  

a-c-g

 

  

a-d-f-g

 

  

a-d-h-i

 

  

b-e-f-g

 

  

b-e-h-i

 

The path with the longest duration is the critical path.

 

Question 2

3 / 3 pts

  
 
The expected duration of this project is:

  

11

 

  

18

 

  

43

 

  

16

 

  

14

 

Add the durations to find the longest path.

 

Question 3

3 / 3 pts

   
 
The slack on activity a in this project is:

  

3

 

  

7

 

  

8

 

  

12

 

  

16

 

Slack = length of critical path – length of longest path an activity is on

 

PartialQuestion 4

1.14 / 2 pts

Select all of the items below that delayed the construction of the bridge in the video you watched for this learning unit:

  

Suicidal man

 

  

Heavy rain and flood

 

  

concrete didn’t pass quality test

  

excavator hit a sunken barge

 

  

crane tilt

 

  

untested technique of installing cable stays

 

  

problems with cofferdam

 

  

shortage of workers

 

  

earthquake

 

 

Question 5

1 / 1 pts

The project management strategy of injecting additional resources in order to reduce the length of the project is called:

  

expediting

 

  

rushing

 

  

panicking

 

  

crashing

 

  

loading

 

Crashing a project reduces its duration.

 

Question 6

1 / 1 pts

Project management differs from management of more traditional activities mainly because of:

  

its limited time frame

 

  

its unique, defined set of activities

 

  

(a) and (b)

 

  

the requirement for use of the appropriate resources

 

  

the need for planning and execution

 

These are the primary reasons that project management differs from the management of more traditional tasks.

 

Question 7

1 / 1 pts

The sum of times of the longest path in a network indicates expected project completion time, and the activities represent the critical activities.

  

True

 

  

False

 

These are definitions of the critical path and the critical activities.

 

Question 8

1 / 1 pts

A sequence of activities that leads from the starting node to the finishing node is called a _______.

  

Path

 

  

Sequel

 

  

Trail

 

  

Critical sequence

 

  

Time line

 

This is called a path.

 

Question 9

1 / 1 pts

Activities not on the critical path have a slack time equal to zero.

  

True

 

  

False

 

Critical path activities have slack time equal to zero.

 

Question 10

1 / 1 pts

A popular tool for planning and scheduling simple projects, and for initial planning on more complex projects, is the:

  

activity-on-arrows network

 

  

activity-on-nodes network

 

  

Gantt chart

 

  

critical path method

 

  

program evaluation and review technique

 

Gantt charts are useful for simply projects.

 

Question 11

1 / 1 pts

Shortening activity durations is called:

  

Expediting

 

  

Crashing

 

  

Vendor management

 

  

Null nodes

 

  

Trade-off analysis

 

Crashing an activity shortens its duration.

 

Question 12

2 / 2 pts

What specific activity described in the Shuttle launch article that you were assigned to read in this learning unit illustrates the concept of having slack in a project?

Ans    Fueling

 


QUIZ: Inventory Management Quiz

 

 

 

Question 1

3 / 3 pts

            A pizza parlor must decide how much flour to order each time they place an order. Their annual demand for flour is 9000 pounds. The price of a pound of flour is $6. The annual holding cost of flour is $3 per pound. The pizza parlor incurs a flat ordering/delivery cost of $25 every time flour is ordered/delivered. The delivery lead time is 4 days. What is the pizza parlor’s optimal/economic order quantity for flour (choose the closest answer)?

  

Approximately 46 lbs per order.

 

  

Approximately 387 lbs per order.

  

 Approximately 224 lbs per order.

  

Approximately 274 lbs per order.

  

Approximately 190 lbs per order.

 

Question 2

2 / 2 pts

The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
 
At what point should he reorder Stein beer?

  

0 cases remaining

 

  

4 cases remaining

 

  

12 cases remaining

 

  

16 cases remaining

 

  

20 cases remaining

 

Use the basic reorder point with no demand uncertainty.

 

Question 3

1 / 1 pts

 Assume that all assumptions of the EOQ model hold. If a firm wants to minimize total annual costs, and currently their ordering strategy for product Z results in annual holding costs of $5678 and annual ordering costs of $8765, what should the firm do to lower their costs?

 

order more of the product Z in each order, and thus order less frequently

 

 

order less of the product Z in each order, and thus order more frequently

  

 increase the number of suppliers

  

 maintain the current ordering strategy

  

unable to determine with the information provided

 

Question 4

1 / 1 pts

Which of the following is a purpose of holding inventory? Select all that are correct.

 

 To provide a safeguard for variation in raw material delivery time. 

  

To decrease the chance of a stock-out occurring.

  

To decrease total annual inventory holding cost.

  

To obtain quantity discounts.

 

Question 5

1 / 1 pts

The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
 
If he were to order 16 cases of Stein beer at a time, what would be the average inventory level?

  

4 cases

 

  

12 cases

 

  

8 cases

 

  

20 cases

 

  

16 cases

 

Divide the order quantity by two.

 

Question 6

1 / 1 pts

DVD recorders would be an example of independent demand items.

  

True

 

  

False

 

Components of the DVD recorders would be dependent demand items.

 

Question 7

1 / 1 pts

It is critical that the exact quantity calculated in the EOQ model be ordered.

  

True

 

  

False

 

Because the total cost curve is flat, modest rounding of the EOQ is permissible.

 

Question 8

1 / 1 pts

Which of the following is least likely to be included in order costs?

  

processing vendor invoices for payment

 

  

moving delivered goods to temporary storage

 

  

inspecting incoming goods for quantity

 

  

taking an inventory to determine how much is needed

 

  

temporary storage of delivered goods

 

Storage costs are holding costs.

 

Question 9

1 / 1 pts

Dairy items, fresh fruit and newspapers are items that:

  

do not require safety stocks

 

  

cannot be ordered in large quantities

 

  

are subject to deterioration and spoilage

 

  

require that prices be lowered every two days

 

  

have minimal holding costs

 

Deterioration and spoilage increase holding costs.

 

Question 10

1 / 1 pts

 If a firm’s service level decreases, this means the firm will encounter more shortages and will be less likely to satisfy demand.

  

True

 

  

False

 

 

Question 11

1 / 1 pts

The calculation of safety stock requires knowledge of demand and lead time variability.

  

True

 

  

False

 

Both of these play a role in the calculation of safety stock.

 

Question 12

1 / 1 pts

An example of inventory holding cost is the cost of moving goods to temporary storage after receipt from a supplier.

  

True

 

  

False

 

These are ordering costs.

 

Question 13

1 / 1 pts

   The primary objective in determining the Economic Order Quantity (EOQ) for an item is to:

 

  

 minimize the quantity of the item ordered from the supplier each time. 

  

  order the item from a supplier located in close proximity.

  

minimize the annual total inventory cost for that item.

  

maximize the time between orders.

 

find a quick and easy way to answer the lot sizing question, regardless of whether the demand for the item is dependent or independent. 

 

 

Question 14

1 / 1 pts

Using the EOQ model, the higher an item’s carrying costs, the more frequently it will be ordered.

  

True

 

  

False

 

As carrying costs increase, the optimal order quantity decreases.

 

Question 15

1 / 1 pts

One important use of inventories in manufacturing is to decouple operations through the use of work in process inventories.

  

True

 

  

False

 

Decoupling operations is an important use of inventories.

 

Question 16

1 / 1 pts

Interest, insurance, and opportunity costs are all associated with holding costs.

  

True

 

  

False

 

These are holding costs.

 

Question 17

1 / 1 pts

A fixed-order quantity system perpetually monitors the inventory level and places a new order when it reaches some level.

  

True

 

  

False

 


QUIZ: Quality Control

 

Question 1

 

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

  

mean

 

  

variance

 

  

standard deviation

 

  

range

 

  

proportion

 

Proportions would be control with attribute control charts.

 

Question 2

1 / 1 pts

Attribute data are counted, variable data are measured.

  

True

 

  

False

 

These distinguish attribute from variable data.

 

Question 3

1 / 1 pts

Non-random variation is likely whenever all observations are between the LCL and UCL.

  

True

 

  

False

 

If all observations are between the LCL and UCL, then the process would be considered in control.

 

Question 4

1 / 1 pts

A shift in the process mean for a measured characteristic would most likely be detected by a:

  

p-chart

 

  

x-bar chart

 

  

c-chart

 

  

R-chart

 

  

s-chart

 

X-bar charts monitor the process mean.

 

Question 5

1 / 1 pts

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

  

True

 

  

False

 

These interact to set the optimum amount of inspection.

 

Question 6

1 / 1 pts

The purpose of control charts is to:

  

estimate the proportion of output that is acceptable

 

  

weed out defective items

 

  

determine if the output is within tolerances/specifications

 

 

distinguish between random variation and assignable variation in the process

  

provide meaningful work for quality inspectors

 

Control charts are used to signal assignable variation.

 

Question 7

1 / 1 pts

Attributes need to be measured, variable data can be counted.

  

True

 

  

False

 

Attributes need to be counted, variable data is measured.

 

Question 8

1 / 1 pts

If a process is performing as it should, it is still possible to obtain observations which are outside of which limits?
(I) tolerances
(II) control limits
(III) process variability

  

I

 

  

II

 

  

I and II

 

  

II and III

 

  

I, II, and III

 

Even capable, in control processes can have observations outside of control limits or tolerances.

 

Question 9

1 / 1 pts

The larger the process variation, the tighter the specifications should be.

  

True

 

  

False

 

Greater variation would lead to wider specifications.

 

Question 10

1 / 1 pts

A p-chart is used to monitor the fraction of defectives in the output of a process.

  

True

 

  

False

 

P-charts involve the fraction of defectives.

 

Question 11

1 / 1 pts

Variation in a sample statistic collected from a process may be either random variation or assignable variation – or both.

  

True

 

  

False

 

Total variation can consist of both random and assignable variation.

 

Question 12

1 / 1 pts

Which of the following relationships must always be incorrect?

  

Tolerances > process variability > control limits

  

Process variability > tolerances > control limits

  

Tolerances > control limits > process variability

  

Process variability > control limits > tolerances

  

Process variability <Tolerances<control limits

Process variability will always be greater than control limits.

 

Question 13

1 / 1 pts

The optimum level of inspection minimizes the sum of inspection costs and the cost of passing defectives.

  

True

 

  

False

 

This represents the optimum balance between inspection and failure costs.

 

Question 14

1 / 1 pts

The output of a process may not conform to specifications even though the process may be statistically “in control.”

  

True

 

  

False

 

A process can be free of non-random variation and still not meet specifications.

 

Question 15

1 / 1 pts

Statistical Process Control is the measurement of rejects in the final product.

  

True

 

  

False

 

SPC is the evaluation of the process.

 

Question 16

3 / 3 pts

The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
 
 
 
What are the 95.5% upper and lower control limits for the p-chart?

  

.95 and .05

 

  

.13 and .07

 

  

.1588 and .0412

 

  

.16 and .04

 

  

.1774 and .0226

 

  

.19 and .01

 

These are two-sigma limits.

 

Question 17

2 / 2 pts

Studies on a machine that molds plastic water pipe indicate that when it is injecting 1-inch diameter pipe, the process standard deviation is 0.05 inches. The one-inch pipe has a specification of 1-inch plus or minus 0.10 inch. What is the process capability index (Cpk) if the long-run process mean is 1 inch?

  

0.50

 

  

0.67

 

  

1.00

 

  

2.00

 

  

none of the above

 

Use the Cpk formula to assess this process’ capability.