Upload
opal-dixon
View
214
Download
1
Tags:
Embed Size (px)
Citation preview
1
Motion-Time StudyA Teaching & Learning Activity
Presented by
W. L. “Pete” Brannan, Ed.D., DTEEngineering & Technology Education Teacher
Manufacturing Instructor
Rockdale Career Academy, Georgia
© 2001
2
Four Classes Produced Lego Beach Buggies Using Three Different Assembly Methods
• Individual production
• Linear Assembly Line production
• Assembly Cell production
5
Georgia Performance Standards
• ENGR-FET3 – Students will explain the universal systems model.
• ENGR-FET4 – Students will apply mathematics and science to the solution of a technological problem.
• ENGR-STEM4 – Students will apply principles of science, technology, engineering, mathematics, interpersonal communication, and teamwork to the solution of technological problems.
6
Georgia Performance Standards
• CTAE-FS-1 Technical Skills: Learners achieve technical content skills necessary to pursue the full range of careers for all pathways in the program concentration.
• CTAE-FS-3 Communications: Learners use various communication skills in expressing and interpreting information.
7
Georgia Performance Standards
• CTAE-FS-4 Problem Solving and Critical Thinking: Learners define and solve problems, and use problem-solving and improvement methods and tools.
• CTAE-FS-8 Leadership and Teamwork: Learners apply leadership and teamwork skills in collaborating with others to accomplish organizational goals and objectives.
9
Individual Production
• Each individual assembled one vehicle
• Two timed trials:– First was a timed “training” event, using
pictured directions in the kit– Second was a speed trial
• Second assembly time demonstrated improvement because of prior “training”
16
Individual Assembly Results(In Seconds)
Low High AverageTrial 1 for “Training” 120 420 268
Period 1Trial 2 for Time 70 185 126
Trial 1 for “Training” 98 525 226Period 2
Trial 2 for Time 50 345 121
Trial 1 for “Training” 120 340 213Period 3
Trial 2 for Time 70 145 116
Trial 1 for “Training” 180 455 291Period 4
Trial 2 for Time 125 360 182
17
Individual Assembly Results
0
100
200
300
400
500
600
1 2 3 4 5 6 7 8 9 10 11
Low/High/Average by Class
Tim
e f
or
Ass
em
bly
of
On
e
Ve
hic
le (
in S
eco
nd
s)
Series1
Series2
Series3
18
Linear Assembly Line Production
• Assembly teams of 7 to 10 people
• Parts were separated & stationed along assembly line
• Timed the assembly of 10 vehicles
• Calculated the time to assemble one vehicle
• Evaluated for production adjustments, then did it again
28
Linear Assembly Line Results
05
10152025303540
1 2 3 4 5 6 7 8 9 10
Assembly Groups
Ave
rag
e T
ime
pe
r V
eh
icle
(in
Se
con
ds)
Series1
Series2
29
Nonlinear Assembly Cell Production
• Assembly teams of 3 to 5 people
• Parts were separated & clustered in the middle of a table, team around the table
• Timed the assembly of 5 vehicles
• Calculated the time to assemble one vehicle
• Evaluated for production adjustments, then did it again
41
Nonlinear Assembly Team Results
0
50
100
150
200
250
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Assembly Teams
Ave
rag
e T
ime
pe
r V
eh
icle
(in
Se
con
ds)
Series1
Series2
43
Production Questions
• What is meant by “Time is money!”?
• How is time a technological resource?
• How can we improve production efficiency?
• How do we reduce the average time per item produced?
• What do we do with the saved time?
44
Production Questions• How do we increase the production volume
in a given period of time?
• Why would we change the order in which we perform tasks?
• Why/how would we combine tasks?
• What is a subassembly?
• Is there a “right number” of employees?
45
Production Questions• Could we produce at the same rate with fewer
employees?
• Which assembly method resulted in the lowest production time per vehicle? Why?
• Compare the production experience between the linear assembly line and the nonlinear assembly cell. Identify and explain the strengths and weaknesses of each method.
46
Production Questions• Is there value in individual production?
How? Why?
• What is the significance of observations and recorded data in production?
• How would we chart or diagram these three assembly methods?
• How would motion-time studies affect the profitability of a company?
47
Production Questions
• Attendance• Punctuality• Task mastery• Task completion
• Team player• Leadership and ability
to follow leadership• Adaptability• Accountability
• How do the following work skills and traits affect employers and employees?
• How do they affect your performance at school?
49
Learning Theories• Behaviorist - (Social Learning) students
learned on the job
• Constructivist - students developed new knowledge through a process of active construction
• Empiricist - students learned from that which they experienced
• Contextual - students learn from each other through cooperation, discourse, teamwork, and self-reflection
50
Learning Descriptors:• Tactile - “hands-on,”
takes advantage of prior experience with playing with Lego's
• Visual - “eyes-on, ” instructions are not written, just pictures
• Reflective - thinking about what was learned
• Interdisciplinary - draws from information and skills acquired in several disciplines
• Cooperative - small group to whole group membership and participation
• Fun - self explanatory
53
Measurement?
• Teacher and Administrative Observation
• Peer and Self Evaluation
• Reflection on Participation
• Student Application
• Student Portfolio Documentation