advanced manufacturing systems design © 1999 john w. nazemetz week 11 discussion discussion topic:...

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

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


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


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



• 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



• 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



• Suggestions for ImprovementsSuggestions for Improvements


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


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.


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.


Homework QuestionsHomework Questions (2) (2)

• Equations 10.5-9Equations 10.5-9


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.


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


Other QuestionsOther Questions

• Papers/PresentationsPapers/Presentations

• Test/HomeworkTest/Homework

• OtherOther

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

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