Exam 1 Key - 6.’"%an2007 T E Lockhart use 3014 rr’fA EXAMINATION Examination guidelines 0 Part I Closed book closed notes 0 Part II Opened

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Unformatted text preview: 6' .’"%an2007 . T. E. Lockhart use 3014 -- rr’fA EXAMINATION Examination guidelines: 0 Part I: Closed book / closed notes 0 Part II: Opened book / opened notes 0 Use complete sentences to respond to narrative questions. 0 Use the space provided to answer questions. 0 Please write Iegibly. 0 Note the weighting on the various problems. Pledge: I neither gave nor received any unauthorized information on or about this examination. (Signature) I Part |: Closed Book/Closed Notes 1. True or False (answer T/F beside the letter) (20 Points) 1-? Waite b. Synthetic rating evaluates operation rate from predetermined time values. {a} lemental times are based on previous time studies which have been proven to be accurate. d. Work measurement is analysis and work methods is design. Te. Disadvantage of the continuous method of watch recording is that it can not immediater tell elemental time. T f. Setting the time standards using the predetermined-time system is based on elemental descriptions and synthesized time variables. ating scales provide an integrated summary of physical workload, from the perspective of the operator. /( h. Element times of 0.04 min is a short element and 0.25 min is a reasonable one ’C i. Time study for a Non-cyclic work should be performed using continuous timing method Predetermined time systems enable determination of standard times for new operations for whom we don’t have past data < ‘2. Multiple Choice (circle the correct answer) - 12 points The “efficien " is defined as [B 0 standard time for doing a job/actual time spent on the job actual working time spent by the worker/worker's capacity “Utilization” is defined as A. Total amount of production time/production time of a single unit é actual working time spent by the machine/machine's capacity Allowances are ad'ustment of the standard time to com ensat loses due to A. personal needs B. Fatigue C. Unavoidable delays ndard time is the mount of time determined b the en erformin' iner as reuired for B. element T a. Allowances are adjustment of the standard time to compensate unavoidable delays. ( 0M Reds , W, I 'W‘Wmir You Must turn in Part | before beginning Part II. Part II: Open Book/Open Notes 3. Fifteen cycles were observed and the data below was tabulated for a three element task. (32 points) Given 95% confidence, what would be the (one) accuracy associated with the study you will use? (12 points) Q ‘ m Cl ‘ l ‘6 fl Z [/\= [8 exp» 61$ E= KEV—s] c 0"; Panama: E/y = l Given that you want a 5% accuracy associated with the study, what would be the statistical confidence in your results? (10 points) "Es-E5313 \ you wan e auracy of”???ng . . , M " , _ additional readings would you have to make? (10 points) w I = M: £12: Clam E : ‘OlCSong @/ IQ : “.5; E LM)12: \OB 4. Below are the first four cycles of a time study that involves a seven elements task (given to a worker doing light job in a very good environmental and working conditions). Time is recorded in hundredths of a minute and the Continuous Method of timekeeping was utilized in the study. A) Calculate standard time given that performance rating was good for skill, poor for effort, good for conditions, and fair for consistency. (12 points) B) Elements 6 and 7 are non-cyclic elements. How will the averages of these elements be treated in determining the standard time for the task as a whole? (3 points) C) When Element 2 in Cycle 4 was observed, the technician failed to observer the ending time of the element. What must he do to compensate for this error in observation? (3 points) Cycle Element 1 2 3 1 17 371 673 56 41 1 774 72 425 789 96 446 817 105 456 826 655 NOM‘UNt 346 WWW toe Rwr EFFwt~ ~47. M with» ~ «tom 5. A stopwatch time study was used to time a wafiéng pace and the data is reported below. (18 points) Distance (in paces) A. Neglecting concept of rating and allowances, use a simple regression analysis to create a model to predict the time to walk a given distance. The 3 ‘0. 011% + «5% L (infinite) R1: 3343 B. Consider the data pairs (20 paces, 0.095 minutes) and (35 paces. 0.137 minutes), predict the time to walk 27.1 paces. E " Yb N )(x )(b —\ a pic X» A L’s. 41°“ 1 ‘l'B‘l-\O‘fi 33 All) ll x ll’c87é C. Use your regression model to predict the time to walk 27.1 paces. Why is this “better” answer than the one you obtained by interpolation? ...
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This note was uploaded on 04/01/2008 for the course ISE 3014 taught by Professor Telockhart during the Fall '08 term at Virginia Tech.

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Exam 1 Key - 6.’"%an2007 T E Lockhart use 3014 rr’fA EXAMINATION Examination guidelines 0 Part I Closed book closed notes 0 Part II Opened

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