Time study - process design, Operation Management

Assignment Help:

Time Study - Process Design

Time study by stopwatch or micro-motion analysis is the original method of work measurement devised by Taylor and his followers, and is still routinely used for the establishment of standard times wherever routine, repetitive work is entailed. Assuming the job has previously been method-studied, its record is first examined and the sequence broken into elements. These elements (typically 5 to 30 seconds) are distinct parts of the job, which allow the separation of effective working time and ineffective time, and allow accurate rating (since the worker's pace may change for certain elements). They also allow the identification of arduous elements, to which appropriate allowances may be added, and facilitate the compilation of standard data for frequently recurring elements. Because there is a natural variability in work pace it is necessary to measure the element several times in order to establish a reliable average observed time. Clearly, the greater the number of measurements (sample size, N), the more accurate will be the calculated observed time, but the cost of the study will increase. Fortunately, since the variability typically follows a normal distribution, we can take advantage of statistical analysis. If, as is typical, an estimate within ±5 per cent of the true value and 95 per cent confidence level is acceptable, then the following means can be used to determine the sample size. First of all a small preliminary sample of 'n' of measurements is taken, and the following calculation performed to determine the full sample size, 'N'.

1249_Time Study – Process Design.png

Where x = the individual measurements 

For example, if a preliminary sample of five measurements is taken in units of 0.01 minutes: 7, 6, 7, 7, 6. the full-study sample size is then calculated as:

300_Time Study – Process Design 2.png

The measurements are then made, simultaneously assessing the rating of the worker's pace, and the standard time for the job calculated as indicated earlier.


Related Discussions:- Time study - process design

Explain the effective general leadership traits, For years, David and Evie ...

For years, David and Evie Wexler of The Little Guys Home Electronics had many ideas about how to improve the home electronics store in which they were working, but could not put th

Explain business knowledge competencies, Business knowledge competencies ar...

Business knowledge competencies are particularly important for which human resource role? Answer A) management developer B) employee advocate C) strategic partner D) functional exp

Define how you might take production line approach, Q1: Explain how you mig...

Q1: Explain how you might take production line approach (transferring the concepts and methodologies of operations management) to a service organization such as a branch bank. Q

Define how you would decide the number of seats, During busy periods, a new...

During busy periods, a new customer walks into LHS every 15 mins. (with a standard deviation of 15 mins). At SHC, a customer walks in every hour (with a standard deviation of 1 hou

Explain what output rate will be achieved, An assembly line with 30 activit...

An assembly line with 30 activities is to be balanced. The total amount of time to complete all 30 activities is 42 minutes. The longest activity takes 2.4 minutes and the shortest

Explain what is the optimal opder quantity for coffee, A special coffeehous...

A special coffeehouse sells Colombian coffee at a fairly steady reat of 30 pounds per month. The beans are purchased from a local supplier for $3.20 per pound. The coffeehouse esti

How to find the optimum number of units, A manufacturing company sells its ...

A manufacturing company sells its products directly to customers and operates 5 days a week, 52 weeks a year. The production department of this company can produce at the rate of 6

Molecular response to thyroid hormones, Molecular Response to Thyroid Hormo...

Molecular Response to Thyroid Hormones during Metamorphosis Thyroid hormones can cause obtainable tissues to break down or can remold the tissues to their adult function. The

Describe when stakeholder identification occurs, Explain when stakeholder i...

Explain when stakeholder identification occurs and explain the importance of stakeholder analysis

Multi-skill staff and multipurpose machinery flexible, How are multi-skill ...

How are multi-skill staff and multipurpose machinery flexible? Multi skilled operatives permit greater flexibility and economies of scope. For example quite than just being a m

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd