How many overseas workers do you really need, and when does each of them have to be ready? If the recruitment request is just last year’s headcount copied across, you can easily end up with one department scrambling for staff while another has people standing around waiting for something to do. So start the sums somewhere else: with the workload, the skills it takes and the hours your operation has to cover.

Here’s the method in a nutshell. To calculate overseas manpower requirements, estimate the work for each role and period and turn it into a staffing figure. Then take off whatever capacity your existing team can genuinely provide. Add an allowance for absence or changes (one you can justify), and tie the vacancies that are left to recruitment and deployment dates that are actually realistic.

Assess project and operating requirements first

Begin with what your business has promised to deliver. That could be rooms to turn around, units off a production line, warehouse orders, construction work, or hours of round-the-clock operational cover. Then chop the requirement into periods short enough to show where demand rises and falls.

Get your managers to explain what really drives their workload, and which jobs can’t start until another team has finished. On a project, you might need the technicians in before the general operatives. A hotel might need its opening team in place before occupancy starts to climb.

Recent operational records are useful, if you have them. Just check whether the equipment, the processes or the quality standards have changed since. And treat past output as a reference point, not a target. Last year’s best month might have happened under conditions you won’t get again.

The CIPD’s workforce planning guidance backs looking at demand and workforce supply side by side. With overseas hiring, there’s one more thing that review has to include: the time it takes before a selected worker can lawfully start at your location.

Calculate headcount from workload and usable capacity

A sensible first step is a simple division. Take the workload hours you need and divide them by the productive hours one worker can give you over the same period. “Productive” is the important word there. It leaves out time that can’t go on the task itself, like agreed breaks, training or other duties they’ve been given.

Time for some numbers. Say a department needs 1,920 task hours a week. If one employee can put in 32 productive task hours within the working arrangements that apply, your baseline is 60 people. (These are planning assumptions, by the way. They’re not recommended working hours, and they’re not a legal standard.)

Next, allow for absence and the other dips in availability you can expect. Suppose you can justify assuming that 90 per cent of your staffing capacity will be available. Divide 60 by 0.90, round up, and you get 67. Count that allowance once. It’s surprisingly easy to add it again further down the sheet under a different name.

Last step: take off the existing capacity that’s confirmed for that work. If you’ve got 25 suitably skilled employees available, the recruitment gap in this example is 42. Your own figures will differ, of course. Use whatever assumptions your real workload, working rules and absence patterns call for.

Check shift coverage as well as total hours

Now hold the numbers up against the roster. Having enough hours across the week doesn’t mean you’ll have a qualified person on hand every moment you need one. That gap bites hardest in continuous operations, or where duties need specialist supervision.

Take an operation with four posts that have to be staffed around the clock. That’s 672 coverage hours every week. Dividing that by a nominal weekly allocation per person gives you a rough starting figure. The final roster still has to work around rest, leave, training and whatever working-time rules apply, though.

When workload and coverage are answering different questions, work them out separately. But be careful. If the same people are doing the tasks while they’re sitting in the covered posts, adding the two totals together counts the same need twice. Before anyone approves a hiring number, get the operations manager to explain how the two relate.

Define job roles before issuing the hiring request

A headcount figure doesn’t help recruitment much until it’s attached to clear roles. For each one, write down what the person will do, where they’ll be based, who’ll supervise them and which tasks they have to handle on their own.

Add the qualifications, experience, equipment knowledge and any language requirements the job genuinely calls for. Then split the must-haves from the nice-to-haves. That keeps sourcing focused without shutting out people who could do the job well after some reasonable training.

In the requirement sheet, list workers, team leaders and technical specialists separately. If you’re short of supervisors, say so. Don’t bury it inside a general request for more operatives, because finding and assessing supervisors is a different exercise altogether.

Check pay and benefits with whoever holds the budget. If the package on offer doesn’t match the role you’re asking for, that has to be sorted out before your recruitment partner puts the vacancy in front of candidates.

Balance skilled and semi skilled requirements

Map out which tasks need formal authorisation, specialist competence or independent judgment. Those roles need selection standards of their own, and they can take longer to fill than work someone can learn under supervision.

For semi-skilled requirements, spell out the practical abilities you expect on day one and what you’ll teach after arrival. Vague labels like “general worker” cover a lot of ground. Loading, cleaning, machine support and food preparation are very different jobs.

And don’t assume your experienced staff can look after any number of new starters while keeping their own output up. Build in realistic trainer and supervisor capacity, especially if the intake is big or the work carries serious safety responsibilities.

Work backwards from the date workers are needed

The day workers arrive and the day they need to be productive are two different dates. Leave room in between for induction, site access, supervised familiarisation and any checks that have to be done locally.

Build the recruitment timeline around each stage: approving the brief, sourcing, assessments, employer decisions, documentation, authorisation and travel. Some of these can run side by side. Others can’t start until an earlier decision is made. Work out which is which, and give every milestone an owner.

Use lead times that have been confirmed for your destination and your candidate profile. A general agency estimate isn’t a deployment promise, so don’t treat it like one. And if your operating deadline comes earlier than the verified sequence allows? Then either the project plan changes, or you look at lawful alternatives.

Create an actionable manpower requirement sheet

Your final sheet needs to link every vacancy to a business need, an approved package and a start period. For each role, cover:

• Where the work is, the department, the duties and the reporting line.
• The workload or coverage basis, the total requirement and the capacity you already have.
• The recruitment gap, the skills criteria and how candidates will be assessed.
• Pay, benefits, accommodation and transport arrangements.
• The intended start period, the recruitment milestones and who signs off what.

Keep your assumptions in plain view, so managers can update the numbers when demand shifts. Then have finance, operations and HR sign off one and the same version before sourcing starts. Otherwise you’ll have three teams working from three different sets of numbers.

Frequently asked questions

Should employers add a fixed contingency percentage?

We’d steer clear of a flat figure. Use an allowance you can back up with absence records, demand uncertainty or risks you’ve actually identified. A blanket percentage can hide double-counting, and it may not suit roles where the real constraint is a qualification or a particular shift.

How often should manpower requirements be reviewed?

Whenever something moves: the workload, the project timing, your productivity assumptions or the staff you have available.

Share your requirements with Oman Agencies

Oman Agencies provides overseas manpower recruitment across a range of industries and job categories. Send our team your approved roles, headcount, selection criteria and the start periods you need, and we can talk through candidate sourcing against your operational needs. A clear manpower requirement sheet helps both of us agree on a realistic recruitment plan before any hiring begins.