4-CH- 20-21(TS) - CHAPTER 20 LECTURES 33-34 TIME STUDY...

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CHAPTER 20 LECTURES 33-34 TIME STUDY
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VARIOUS METHODS AND DEVICES EMPLOYED FOR MEASURING WORK 1. ESTIMATE: Data provided usually by an experienced estimator. 2. PAST EXPERIENCE: Data obtained from company records. (These are often used for cost estimating and budget purposes but not recommended for establishing time standards for direct labor for wage incentive purposes)
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3. TIME STUDY CONTD. Data obtained by means of (a) Stop watch ‑ electronic timer 1. Decimal‑minute stop watch 2. Decimal‑hour stop watch 3. Decimal‑minute electronic timer (b) Electronic data collector Computer‑aided Datamyte (c) Motion picture cameras (16‑mm. and 8‑mm) 1. Spring‑driven or battery‑driven ‑ normal speed 60 frames per minute 2. Electric motor‑driven ‑ 1000 frames per minute 3. Time‑lapse ‑ 1 to 180 frames per minute
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CONTD. (d) Video cameras and recorders Portable camera and recorder- ½ inch or 1 inch tape (e) Machines using moving tape or disc , and (f) Counters 4. STANDARD DATA Information obtained from time study or Pre-determined Time Systems (PTS) 5. PREDETERMINED TIME SYSTEMS [PTS] Different systems of PTS like (a) The Work‑Factor System (WFS) (b) Methods‑Time Measurement (MTM)
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DEFINITION OF TIME STUDY(TS) Time Study is used to measure human work by determining STANDARD TIME (ST). STANDARD TIME is the TIME taken by a QUALIFIED and well trained person working at a NORMAL PACE, and following a PRESPECIFIED method to do a PREDEFINED task.
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TIME STUDY(TS) EQUIPMENT Equipment needed for TS are: A timing device An observation board Observation sheets/forms Most commonly used timing devices are : 1. Stop Watch or Electronic Timer 2. Motion Picture Camera (with constant speed motor drive or with a Michrochronometer in the view to give time) 3. Electronic Data Collector and Computer
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STOP WATCHES (a) ELECTRONIC Stand alone stop watch or Electronic study board (b) MECHANICAL FLYBACK (used for either snap-back or cumulative timings) SPLIT HAND (the secondary knob causes one of the hands to stand still while the other continues to measure time . On pressing the knob again the stopped hand returns to the moving one and the two go together). NON FLYBACK (is controlled by the pressure exerted on the top of the winding knob; the first pressure starting the watch and second one stopping it, the third one returning the hands to zero position. It is used for CUMULATIVE TIMING ).
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ELECTRONIC STOP WATCH & STUDY BOARD Electronic watches can record time in fractions of a second/minute/hour. Electronic data capture devices or study boards are used to record activity-times, the device automatically assigning times to elements of the task. These may be of the following types: (a) Hand held computers with software system.
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