Dear Uthiramoorthy, all the learned members who responded to your query so far, except Mr. Nathrao, have confined their replies to the maximum number of hours of work as per the provisions of different establishment-oriented labor laws. Apart from the type of establishment to which the query is related, I am constrained to state that a clear-cut understanding of the difference between the "hours of actual work in a day" and the "period of spread over of working hours in a day" will prove that the proposal mentioned in your question is not a new concept but a misconception of the legal provisions relating to working hours. Everyone will accept that "hours of actual work" needs no detailed explanation. But "spread over" refers to the time-stretch the workman/employee is at the disposal of the employer. We all know pretty well that a workman/employee can be allowed to work continuously for a maximum of 5 hours only, beyond which he should be allowed a rest interval of at least half an hour. The exceptions, as far as I am able to remember right now, are Sec.15(1) of the Motor Transport Workers Act, 1961, which totally exempts rest intervals in the case of a motor transport worker who is not required to work for more than 6 hours on any particular day, and Sec.55(2) of the Factories Act, 1948, empowering the Chief Inspector to exempt any factory from rest intervals subject to the condition that the total number of hours worked without an interval does not exceed six. So, the spread over is the stretch of time the workman is at the disposal of the employer, like I said earlier, including the interval for rest. Therefore, three days weekly off with 48 hours of total work on the basis of 12 hours continuous work for 4 days in a week cannot be legally permissible at all.
Understanding Employee Terminology
Coming to Brijendra's questions, 'employee' is a generic term indicating a person who is paid to work for somebody, whereas 'workman' is the person employed to do physical work. The term 'staff' collectively refers to all the workers employed as a group. Apart from 'blue-collar' and 'white-collar', there is yet another one called 'gold collar', indicating higher-level managers.
Regards.