Chapter 8 Concept Checks
Producer's Risk refers to which of the following scenarios?
When a buyer rejects a shipment of high quality units because the sample did not meet the acceptance standard.
Calculate the number of inventory containers (round up) required given the following Demand rate= 12 parts per hour Safety Stock required = 10% Size of containers = 8 parts Time to cycle through the system = 4 hours
[12(4)(1.1)]/8 = 6.6 or 7 rounding up
Poka-yoke refers to:
Error- or mistake-proofing
Variations in process measurements can be classified as either natural or:
assignable
Which of the following is NOT one of the seven wastes
Environmental waste
A company makes golf balls with painted logos in boxes of 100. The organization wants to construct a P-chart to track the percentage of golf balls with no logo in each sample. If the company used one box in each sample in the dataset, what is the sample standard deviation for the P-chart? Choose the closest answer.
.019
A company that produces 8 pound bags of potting mix gathered 4 samples of 5 bags. The weights of each bag are listed below. What is R?
.40
Bill owns Speedy Deliveries and keeps track of customer complaints. For each delivery, there are two possible complaints: a late delivery and a wrong delivery. Bill tracks the delivery "defects" and then uses this information to determine his company's Six Sigma quality level. During the past week, his company made 322 deliveries. His drivers received 8 late delivery complaints and 4 incorrect delivery complaints. What is Bill's defects per million opportunities (DPMO)?
18634
According to the Six Sigma philosophy, the Six Sigma goal is to have ____ defects per million measurement opportunities.
3.4
A company that produces 8 pound bags of potting mix gathered 4 samples of 5 bags. The weights of each bag are listed below. What is X ?
8.10
C charts are useful when:
A number of mistakes or errors can occur per unit of output, but they occur infrequently
When purchase order quantities are cut in half, which of the following will be true
Average inventory levels will also be cut in half
Which of the following quality gurus believe that companies should strive for zero defects and that quality was, in a sense, free since quality improvement programs invariably paid for themselves?
Crosby
If lot sizes are reduced by 50%, what impact will this have on average inventory levels
Decrease by 50%
The person credited with creating the modern quality system is
Deming
An important outcome of statistical process control is
Firms can take corrective actions before process variabilities get out of control Firms can visually monitor process performance
Annotated boxes representing process to show the flow of products or customers.
Flow Diagrams
Which of the following is NOT consistent with the lean philosophy
Increasing batch sizes to take advantage of economies of scale
Which of the following are among the MOST important elements of the lean production philosophy
Inventory reduction and continuous improvement
How do lean systems impact the environment?
It reduces waste, which improves the environment
Lean production systems are sometimes referred to as pull systems because demand from customers activates the production actions of the manufacturing facilities. In order for this demand to be communicated to everyone in the supply chain/manufacturing facility a signal must be passed from downstream processing centers tot he upstream processing centers. This system of relaying signals is referred to as a
Kanban System
Moving small production batches through a lean production facility is often accomplished using
Kanbans
Japanese manufacturing firms sometimes create cooperative coalitions with their suppliers in order to provide the suppliers with a certain degree of financial support. What are these cooperative coalitions called?
Keiretsu Networks
When a process is considered in control, this means that:
Only natural process variations are present. No data plots fall outside the control limits. The data plots appear normally distributed around the desired measurement.
Which tool is useful for presenting data in an organized fashion, indicating process problems from most to least severe
Pareto Charts
The Toyota Production System was initially designed based on:
Several trips by the Toyoda family to the Ford manufacturing plant.
In lean terminology, yokoten refers to:
Sharing best practices with suppliers and customers.
Use of Six Sigma helps supply chains become lean, due to:
The impact that improved quality has on reducing safety stocks
Attribute data are shown as:
The percent defectives within a sample.
Which tool is useful for determining the frequencies of specific problems?
check sheet
Which of the following is the MOST important elements of the lean production philosophy?
inventory reduction and continuous improvement
Check Sheets
to determine frequencies for specific problems.
Cause and Effect Diagrams (Fishbone or Ishikawa diagrams)
used to aid in brainstorming & isolating the causes of a problem.
