Chapter 5

Which is an appropriate unit for measuring the demand rate when analyzing a process with flow unit dependent processing times?

Minutes

What is the effect of rework at a bottleneck step on process capacity?

Rework will decrease process capacity

True or false: Flow units that are scrapped complete the process.

False

True or false: If a resource has implied utilization greater than 100%, then it is always the bottleneck.

False

True or false: In a process with multiple flows, all of the resources have the same demand.

False

True or false: In a supply-constrained process with multiple flows, the capacity for some flows will exceed demand.

False

True or false: One ought to add capacity only to the resource with the highest implied utilization.

False

True or false: Patient is an appropriate flow unit for process analysis when different patients require different amounts of time with a doctor.

False

True or false: There is one processing time for a process that requires rework.

False

True or false: When a product mix exists, every flow unit follows identical steps and completes the entire process.

False

If the process' maximum implied utilization increases and everything else remains the same, then the maximum flow rate of a flow ______.

decreases

Removing ______ flow units from the process is known as scrapping.

defective

If a process with multiple flows is demand-constrained, then the actual flow rate equals the ______.

demand for the flow

The capacity of a resource in terms of flow units per time period equals the demand--in terms of good flow units per time period--______ the yield.

divided by

The maximum rate of a flow equals the demand rate for the flow ______ the process' maximum implied utilization

divided by

If a resource produces more defects then its yield will go _____.

down

The total demand at the resource is always _______ implied utilization.

equal to

In terms of improving a process with multiple flows--through capacity addition--which of the following is the most important goal?

find the bottleneck

When determining how much work each resource is capable of doing, indicate which of the following are the goals that we want to accomplish.

find the bottleneck, evaluate the actual flow rate through the process, determine the maximum flow rate

With a capacity constrained process with multiple flow units, the maximum flow rate for all units is determined by summing the maximum ______ rate for each type of flow.

flow

Capacity alone does not dictate the bottleneck because the resource with the lowest capacity may be visited the ______ often.

least

To have an implied utilization less than 100%, a resource must face a demand rate that is _______ 60 minutes per hour.

less than

A process wherein each step reliably performs high-quality work will have ____ attrition losses.

low

If a process with multiple flows is supply constrained, then the actual flow rate equals the ______ rate.

maximum flow rate

In a table used to calculate implied utilization, the resource's capacity and total demand are expressed in ______.

minutes of work

Which of the following are correct expressions of the capacity of a worker?

minutes of work per hour, seconds of work per hour

In a table used to calculate implied utilization, each resource will occupy _____ row(s).

one

Which metric cannot exceed 100%?

utilization

When dealing with flow-dependent processing times, the processing times for each flow unit ______.

vary depending upon the particular patient type

The yield in good flow units of a resource ______ be greater than 0, if the yield of a subsequent resource equals 0.

will not

To calculate the capacities in good flow units per time period, one multiplies the capacity of flow units per time period by the .

yield

To calculate the capacities in good flow units per time period, one multiplies the capacity of flow units per time period by the ______

yield

If one resource in a process ALWAYS produces defective parts, then the process yield is ___%

0

Rank--from first to last--the following steps for finding the bottleneck and capacity in a process with rework.

1. At each resource with rework, evaluate the weighted average processing time. 2. Evaluate the capacity of each resources. 3. Evaluate--for each resource--the implied utlilization

List--from the beginning to the end--the order of steps required to find the bottleneck and flow rates in a process with multiple flows.

1. Evaluate the demand table 2. Determine the capacity for each resource 3. Calculate and evaluate the implied utilization for each resource 4. Determine the capacity for each type of flow

Using the "minutes of work" concept, indicate the order of steps from first to last for analyzing the resource where rework occurs.

1. Given the nature of the process, determine what time unit is easiest to work in such as "minutes of work", "days of work", etc. 2. For each flow unit type determine the demand per unit of time. 3. Compute the total demand per time unit by adding the demands for each flow unit type. 4. Divide the resource's total demand by its capacity computing implied utilization for the resources.

If each resource in a process has a yield of 100%, then the process will have a yield of

100%

Four workers will provide an hourly capacity of ______.

240 minutes

Suppose the demand rate for flow units of type 1 is 4 units per hour and implied utilization is 125%. What is the flow rate for flow units of type 1?

3.2 units per hour

Suppose the demand rate for flow units of type one is 4 units per hour and implied utilization is 80%. What is the flow rate for flow units of type one?

4 units per hour

Which of the following statements are true about a process that involves rework?

A process that includes rework has multiple flows, A process involving rework can be solved using the "minute of work" flow unit concept, A process that involves rework has different processing times.

A process that has one type of flow through a series of resources.

Demand is the same across resources

A process that has multiple types of flow patterns through a series of resources.

Demand varies across resources.

What can be inferred from a doctor's statement that "some patients have simple issues whereas other have more complex problems."

The process has flow-dependent processing times, The process has multiple flows

True or false: One uses "minutes of work" to express capacity, because it enables one to add together different types of work.

True

True or false: The yield of a resource is between 0% and 100%.

True

True or false: When two products require different resources in a process you must define them as different flow units.

True

To calculate the flow rate across all units, you ____ the flow rates of each unit.

add

To depict different flow units, different colors or labels are attached to the ______ in the diagram.

arrows

Capacity invested in at the___________ is lost from the perspective of the overall process.

bottleneck

Rework has the most impact on process capacity when it occurs at the step.

bottleneck

When a multiple flow process is analyzed using a single flow of good flow units, the _____ is the resource with the smallest capacity of good flow units.

bottleneck

Management ______ affect the maximum flow rate of a given customer type.

can

What information is required to calculate the weighted average processing time?

fraction of each flow that passes through a resource, the processing time for each flow that passes through a resource

To analyze a multiple flow process using a single flow, we must define what constitutes a ______ flow unit.

good

In a demand-constrained process with multiple flows, the capacity for each flow is ______ its demand.

greater than

To have an implied utilization that is greater than 100%, a resource must face demand that is _____ 60 minutes per hour.

greater than

With multiple flow unit types the bottleneck is the resource with the ______ implied utilization.

highest

Which metric allows you to deduce how much demand exceeds the capacity of the process?

implied utilization

When determining which resource to add capacity to, one should consider both _____ utilization and ______ margin.

implied, profit

If the processing time of flow units that require rework increases, then the weighted average processing time at the resource where rework is done, ______.

increases

When analyzing a multiple flow process with a single flow, if the yield increases, then the capacity of good flow units per time period ______.

increases

Rework has the least impact on process capacity when it occurs at steps with a _____ amount of idle time.

large

To calculate the workload of a resource that serves different flow unit types, one must know which of the following?

processing time for each patient type, demand rate for each patient type

The combination of different flow unit types moving through a process is referred as _________ mix.

product

When determining the bottleneck in the presence of multiple flow units you must recognize that not every flow unit is going to every _______.

resource

A good flow unit is one that successfully passes all _____.

resources

Given a supply-constrained process, which of the following actions enables management to control the maximum flow rate for a given type of customer?

shift resources among customer types, given one customer type a higher priority status