It is used in written “estimates” for estimation of the total amount of uninterrupted labour required to perform a task. For example, researching and writing a college paper might require eighty man-hours. Preparing a family banquet from scratch might require ten man-hours. Man-the mythical man month essays on software engineering do not take account of the breaks that people generally require from work, e.
They only count pure labour. Managers count the man-hours and add break time to estimate the amount of time a task will actually take to complete. Thus, while one college course’s written paper might require twenty man-hours to carry out, it almost certainly will not get done in twenty consecutive hours. Its progress will be interrupted by work for other courses, meals, sleep, and other distractions. The advantage of the man-hour concept is that it can be used to estimate the impact of staff changes on the amount of time required for a task.
This is, of course, appropriate to certain types of activities. It is of most use when considering ‘piece-work’, where the activity being managed consists of discrete activities having simple dependencies, and where other factors can be neglected. Therefore, adding another person to a packaging team will increase the output of that team in a predictable manner. In reality, other factors intervene to reduce the simplicity of this model. If some elements of the task have a natural timespan, adding more staff will have a reduced effect: although having two chefs will double the speed of some elements of food preparation, they roast a chicken no faster than one chef.
Some tasks also have a natural number of staff associated with them: the time to chop the vegetables will be halved with the addition of the second chef, but the time to carve the chicken will remain the same. Another example is the adage, “Just because a woman can make a baby in nine months, it does not follow that nine women can make a baby in one month. This adage is often cited in systems development to justify the belief that adding more staff to a project does not guarantee it will get done quicker. It is the amount of work performed by an average worker during one day, week, month, or year, respectively. Austria and by extension to other work. It includes time for breaks and can be used to calculate how long it may take to complete a task, including required recovery times from physically strenuous work, as well as legally-required breaks or other human interactions.
Secretary-General of the Organisation for Economic Co-operation and Development. Official data up to 2005 in spreadsheet format. More details in the paper “Influence of Terrain Conditions and Thinning Regimes on Productivity of a Track-Based Steep Slope Harvester”. This page was last edited on 14 January 2018, at 20:44. 360 series, which happened in 1964. This page was last edited on 15 January 2018, at 12:47.
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