advanced manufacturing systems design © 1999 john w. nazemetz week 11 discussion discussion topic:...
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Advanced Manufacturing Advanced Manufacturing Systems DesignSystems Design
© 1999 © 1999 John W. NazemetzJohn W. Nazemetz
Week 11 DiscussionWeek 11 Discussion
Discussion Topic:Discussion Topic: Course Format, Course Format, Anticipatory QC, HW QuestionsAnticipatory QC, HW Questions
November 2, 1999November 2, 1999
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 2
ADVANCED ADVANCED MANUFACTURING MANUFACTURING SYSTEMS DESIGNSYSTEMS DESIGN
Week 11 Discussion Week 11 Discussion
Announcements, Mid-Course Announcements, Mid-Course Logistics Review, Anticipatory Logistics Review, Anticipatory
QC, HW QuestionsQC, HW Questions
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 3
ANNOUNCEMENTANNOUNCEMENTNo Discussion Meeting Next No Discussion Meeting Next
WeekWeek
Instructor at STEP ConferenceInstructor at STEP Conference
Will Pre-Tape and Post on Will Pre-Tape and Post on Web: Discussion of SBIRE, Inc. Web: Discussion of SBIRE, Inc.
-- Oklahoma’s First/Only -- Oklahoma’s First/Only Legally Recognized Virtual Legally Recognized Virtual
Enterprise Enterprise
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 4
Mid-Course Logistics Mid-Course Logistics Review (1)Review (1)
• Lecture/Week 11 Represents a Lecture/Week 11 Represents a ChangeChange– Weeks 1-10 Text Based– Weeks 11-14 Lecture Based
• Attempt to Expose Students to Information Exchange Technologies
– Prerequisite for Integration
• Goal is Understanding and Comprehension, not Expertise
– Week 15 – Student Papers
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 5
Mid-Course Logistics Mid-Course Logistics Review (2)Review (2)
• How Are We Doing?How Are We Doing?– Use of Net/Videotape for Lecture
• Allows students more control of schedule• Logistics Problems
– Delivery/Receipt– Technical
» Access» Viewing
• Content/Delivery Comments– Pace, Lack of Ability to Question (as in
Regular Class)– Time Distortion
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 6
Mid-Course Logistics Mid-Course Logistics Review (3)Review (3)
• How Are We Doing?How Are We Doing?– Course Website
• Access• Materials Adequacy/Improvement
– Design (content)– Navigation
• Update Frequency/Availability• Instructor Concerns
– Questions/Errata by Topic Input
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 7
Mid-Course Logistics Mid-Course Logistics Review (4)Review (4)
• Suggestions for ImprovementsSuggestions for Improvements
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 8
Anticipatory Quality Anticipatory Quality Control (1)Control (1)
• How does one know as to when to How does one know as to when to apply “look ahead control charts”, apply “look ahead control charts”, as compared to conventional as compared to conventional control charts? control charts? – Note/Comment:
• Both types of charts are developed in same manner
• Difference is WHEN action is taken– Conventional – Observation Outside Limits– Anticipatory – Next Observation Likely to be
Outside Limits
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 9
Anticipatory Quality Anticipatory Quality Control (2)Control (2)
• How does one know as to when to How does one know as to when to apply “look ahead control charts”, as apply “look ahead control charts”, as compared to conventional control compared to conventional control charts? charts? – Data is Autocorrelated– Data is Automatically (Serially) Gathered– Underlying (Non-Random) Model Known
• “Reasonable” Predictor of Next Item• Cost of “Scrap” >> Cost of Lost Tool Life, etc.
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 10
Homework QuestionsHomework Questions (1) (1)
• Re: 10.7Re: 10.7– Even though the example in the book is
just like the question. I still do not understand the relationship of the cost factors given to the hours needed for optimal aggregate production.
– Reference Equations 10.5-9, pg 405 of text.
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 11
Homework QuestionsHomework Questions (2) (2)
• Equations 10.5-9Equations 10.5-9
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 12
Homework Questions Homework Questions (3)(3)
• Possible Confusion #1 -> the first term of Z is the cost/unit to produce a unit, excluding labor (i.e., it is the variable cost of production, material, overhead allocation, etc.). As such, it is $/unit produced NOT $/hr as stated in the HW problem for cx . thus, cx (x1+x2+...x6) is the production cost less labor -- the cost of labor is accounted for in the objective equation by the regular, overtime and undertime terms and these hours are maintained by constraint 10.8.
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 13
Homework Question (4)Homework Question (4)• Possible Confusion #2 -> in 10.8, the constraint
should be/is expressed in hours. Wt represents the regular work force level (in hours); you may be interpreting these values as number of workers (which it is not in the text's formulation). You may be more comfortable with a problem formation that uses Wt as the (integer) number of workers, if so
• 10.8 would become Ot - Ut = kXt -40Wt -- 40 hours/worker/week if one assumes the period has a duration of one week.
• This would require ch to be redefined to represent the cost to hire one worker (not obtain an additional hour of regular time labor)-- similar argument for cf and cw will need to represent the worker cost/period
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Computer Integrated Manufacturing Systems © 1999 John W. NazemetzSlide 14
Other QuestionsOther Questions
• Papers/PresentationsPapers/Presentations
• Test/HomeworkTest/Homework
• OtherOther
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Advanced Manufacturing Advanced Manufacturing Systems DesignSystems Design
© 1999 © 1999 John W. NazemetzJohn W. Nazemetz
Week 11 Discussion SessionWeek 11 Discussion Session
Discussion Topic:Discussion Topic: Mid-Term Mid-Term Assessment, QC, HW QuestionsAssessment, QC, HW Questions
November 2, 1999November 2, 1999
END OF SEGMENTEND OF SEGMENT