Define true lean. correct answers People doing the work, improving their own work, with
training and support from management.
The Takt time is the rate at which a production line can manufacture items.
(True or False)? correct answers False
Which Statement does not reflect the view of standardized work in lean?
a. Standardized work is the most efficient known way to manufacture a product.
b. Standardized work is a way for management to impose production rates on a workforce.
c. Standardized work in lean should be updated regularly.
d. The employees on the line should be involved in establishing standardized work in lean.
correct answers b. Standardized work is a way for management to impose production rates on a
workforce.
The three basic elements of information that must be included in standardized work are: Takt
time, work sequence and WIP levels. (True or False)? correct answers True
Standardized work can serve as an improvement baseline.
(True or False)? correct answers True
Standardized work deters creativity in team members.
(True or False)? correct answers False
Which of the following is not correct about standardized work?
a. It can help build quality and reduce cost.
b. It can help avoid overproduction.
c. Standardized work helps to identify opportunities for improvement..
d. Standardized work must be updated annually. correct answers d. Standardized work must be
updated annually.
Changes in customer demand can necessitate changing the takt time. However, too frequent takt
time changes can be costly as it will require changing all standardized work. How can you avoid
takt time changes when product demand increases by a moderate amount? Use a simple
numerical example to elaborate your answer. correct answers Takt Time = Total Time
Available / Total Customer Demand
, Standardized work is one of the most important tools used in a lean manufacturing environment.
Five of the primary reasons for their usefulness/significance were discussed in the lecture.
Describe three of these reasons (one sentence each). correct answers I. Problem Identification
II. Respect for Customers
III. Improvement Baseline
IV. Improvement Measurement
V. Real Time Status Monitoring
A standardized work sheet developed by a team at Lexington Iron Works is shown below. Based
on the principles discussed in the lectures, describe what additional information must be included
here to make it a useful tool for continuous improvement. In your answer, you must identify at
least 4 types/pieces of information that is not included and discuss what they are. correct answers
Additional information that must be added is symbols for safety points, quality checks, and
WIP's such as + signs for safety, diamonds for quality checks, and dots for WIP's.. Another piece
of information that must be added is arrows connecting each task, these will make
comprehension of work flow easier. Takt time is another piece of information that is not
included, takt time is the time between successive parts going out of a system. Finally, wait and
walk times must be recorded as well. This represents the time used transporting or waiting on
machines/other workers.
Changes in customer demand can necessitate changing the takt time. However, too frequent takt
time changes can be costly as it will require changing all standardized work. How can you avoid
takt time changes when product demand increases by a moderate amount? Use a simple
numerical example to elaborate your answer. correct answers Takt time changes can be avoided
by changing the total time available. If product demand increases, total time available must
increase as well to keep takt time stable. THis could be done by extending the shift period, taking
time out of breaks, or finding new ways to save time in the production process.
Example: Current takt time is 60 seconds (420 minutes available / 420 units demanded). The
demand increases to 450 units. To avoid takt time changes, you must add 30 minutes to the end
of each
We discussed that achieving one-piece flow between stations is not always feasible.
Supermarkets and kanbans must be used in such situations. Describe two situations that would
prevent one-piece flow between two stations and explain why they act as barriers ( no less than
2-3 sentences for each situation). correct answers One situation is that the cycle times vary
between stations. For example, if there is 2 work stations in a production line but the first
workstation process takes twice as long as the second, work station 2 will have to wait for station
1 to complete. This causes wasted time from waiting which makes one piece flow unfeasible.