Manpower calculation - How many additional manpower i need recruit to give weekly off and other leaves?

I want to run a machine by 24*7 by 3 shift and 4 manpower need per shift to run the machine. My question is how many additional manpower i need recruit to give weekly off and other leaves

Dear Atts-BU8,

Let the shift timing be 0800-1600 hours, 1600-2400 hours and 2400-0800 hours

Let the shift workers be named A, B, C, D, E, F, G, H I, J, K and L

Let the standby workers be named P and Q

Then the shift-wise duty roster could be as below:

Day 0800-1600 1600-2400 2400-0800

Monday PBCD QFGH IJKL
Tuesday APCD EQGH IJKL
Wednesday ABPD EFQH IJKL
Thursday ABCP EFGQ IJKL
Friday ABCD EFGH PQKL
Saturday ABCD EFGH IJPQ
Sunday ABCD EFGH IJKL

The above information is also given in the attached Excel sheet. In each cell, a comment is given about the worker's weekly on a particular day and also a shift.

As per the above break up, we need at least 14 hours to run 24 x 7 operations in three shifts with four workers in each shift. But then it does not take care of the workers' sickness or even earned leave. So we need to keep 1-2 workers on standby to take care of their authorised or unauthorised absence. But then what these additional persons will do when all the workers report for duty? Should they remain idle? To avoid their idleness, they need to be trained in the maintenance work. These two persons will double up as maintenance technicians + shift workers.

Thanks,

Dinesh Divekar

To determine the additional manpower needed to provide weekly off and other leaves for a machine that runs 24/7 with three shifts, we need to know the total number of employees required to run the machine.

Assuming that each shift lasts for 8 hours, 4 manpower is needed for each shift. Therefore, the total number of employees required to run the machine is:

Total Employees = (4 manpower per shift) x (3 shifts) = 12 employees

Now, if you want to give weekly off and other leaves, you need to have additional employees to cover for the missing workers. Assuming you want to give one weekly off per week and 10 days of other leave per year, the additional manpower required can be calculated as follows:

Weekly Off:
Assuming each employee gets one weekly off every 7 days, you would need to hire 2 more employees to cover the missing workers during the weekly off. So the total number of employees required becomes:

Total Employees = 12 + 2 = 14 employees

Other Leaves:
Assuming each employee gets 10 days of other leave per year, you would need to hire additional employees to cover for the missing workers during these leave periods. One way to do this is to hire temporary workers or part-time workers who can fill in for the missing workers during their absence. The number of additional employees required depends on how many employees take leave at the same time.

For example, if you assume that one employee is on leave at any given time, you would need to hire 1-2 additional employees to cover for the missing worker. If you assume that two employees are on leave at any given time, you would need to hire 2-4 additional employees to cover for the missing workers.

Therefore, to give weekly off and 10 days of other leave per year, you would need to hire between 14 and 18 employees, depending on the number of employees on leave at any given time.

The exact number of additional manpower you will need to recruit to give weekly off and other leaves depends on your business needs, the size of your workforce, and the number of employees already taking vacations or leaves. You will need to consider things like the amount of available manpower you have to cover shifts and the workload of your staff. You may also need to consider the amount of overtime you are willing to pay in order to cover shifts, or the costs associated with hiring extra personnel. Ultimately, the decision on how many additional manpower you need to recruit will depend on your individual business needs.

One person additional against 06 workers.

3 Shifts , 4 manpower per shift and 7 days operation. Therefore, man days required are 3 x 4 x 7 = 84.

One person with weekly off 6 man days are available per week. Therefore, for 84 man days 84 / 6 = 14 persons will be required with weekly off.

Now if we consider 10% leave cover then 10% of 14 - will be required another 2 persons.

Therefore, total manpower 14 + 2 = 16 will be required with weekly off and 10% leave cover.

S K Bandyopadhyay ( WB, Howrah)
CEO-USD HR Solutions
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straight formula is manpower planning=sanctioned (X)+ 16.7% of (X)+prevailing leave and absent % of X
=12+16.7%*12+ prevailing leave and absent % of X
=12+2+prevailing leave and absent % of X
If prevailing leave and absent % of X is 10%
=12+2+2
=16
If prevailing leave and absent % of X is 5%
=12+2+1=13
If Sanction manpower is very high like 50, 100,200,500,1000 and more
=manpower planning=sanctioned (X)+ 16.7% of (X)+prevailing leave and absent % of X+ attrition % of X.