High Volume Hiring

What high volume hiring is

High volume hiring is filling a large number of positions in one role, or in closely similar roles, within a limited period: opening a new branch, staffing a season, or meeting a planned expansion.

What sets it apart is not the number alone but a shift in the constraint. In ordinary hiring the constraint is the quality of the decision and the width of the choice. Here the constraint becomes capacity: the hours and the days the organisation actually has. A team that runs the second situation with the tools of the first ends up with a process that is correct at every step and still cannot reach the number on time.

The calculation that decides whether the plan is possible

The first thing to do, before a single advertisement goes out, is a calculation that starts from the number of hires required and ends at the hours of the people assessing candidates. Take 300 hires required within 90 days. The figures below are assumptions chosen to show the structure, not benchmarks:

• Candidates assessed. If one assessed candidate in three is hired, 900 candidates have to be assessed.
• Applicants needed. At twelve applicants per hire, the plan needs 3,600 applicants.
• Working days. The 90 days are calendar days. On an assumed working week of five days they correspond to about 64 working days. The conversion is stated because a calculation that divides by 90 produces capacity that does not exist, and because a different working week changes every figure that follows.
• Assessment hours. At forty minutes per candidate, the 900 candidates take 600 hours of one assessor’s time. With a panel of two, that becomes 1,200 hours.

So the requirement is 1,200 hours spread over 64 working days, which is 18.75 hours a day. With five assessors on the work, each carries 3.75 hours a day, roughly 47% of a working day of eight hours, every working day for three months.

The calculation says something more important than its result: every assumption in it moves, and the result moves in proportion. Raising the assessor’s time from forty minutes to sixty raises the 1,200 hours to 1,800, an increase of half. Lowering the hiring rate from one in three to one in four raises the number assessed from 900 to 1,200. The calculation is therefore not done once at the start of the project. It is redone every time one of these numbers turns out differently on the ground.

This is the number that gets overlooked when the plan is approved. The assessors are usually the managers of the very departments being staffed, and half their day spent assessing is half a day in which the operation they are hiring for goes unmanaged. A plan that never counted those hours did not decide against spending them. It decided to spend them without knowing.

Where the constraint really sits

The consequence is that the hiring funnel is managed from its end, not its beginning. The stage that consumes human capacity limits the whole funnel, and everything before it is tuned to that stage:

• More advertising does not produce more hires when capacity is fixed. It lengthens the queue. Three thousand extra applicants against capacity that cannot absorb them produce slower responses, not more hires.
• Greater selectivity multiplies the work directly. Asking for 24 applicants per hire instead of twelve raises the number to be screened to 7,200. At six minutes per CV, that is 720 hours of screening alone, before assessment begins. A smaller selection ratio does widen the field to choose from; what matters here is that the wider field is bought with hours taken from the same capacity that limits the number.
• Shortening one stage does not shorten the whole. The final stretch, from accepting an offer to starting work, is the stage the employer controls least, and it takes the largest share of the elapsed time. In high volume hiring this bites harder, because the goal is a headcount on a given date: a hundred people who accepted in week two may start six weeks later, and the target date counts starters, not acceptances.

What changes in the cost

The largest item in cost per hire is usually internal time, and it drops out of the calculation because no payment voucher is ever issued for it; it is estimated as hours multiplied by the cost of an hour. In high volume hiring that item does not merely drop out; it becomes the whole question. Twelve hundred hours of managers’ time is an item that usually exceeds what is paid to job boards and recruitment agencies combined.

A useful average is normally calculated per job level or per department. Here the opposite happens: the roles are similar and the hires are many, so the average is accurate for once. That accuracy invites a comparison with the organisation’s ordinary cost per hire, and the comparison does not hold. One is an average for a single role hired in bulk; the other is an average across different roles hired one at a time.

What actually shortens the timeline

Because the constraint is capacity rather than procedure, every remedy either reduces the hours spent per candidate or increases the hours available:

• Move rejection ahead of human assessment. Every candidate rejected after an interview has consumed forty minutes. A requirement without which the role cannot be done is checked with a question on the application itself.
• Fix the assessment completely. A structured interview fixes the questions, their order, the rating scale and the independence of the assessors. Its effect here is not only on the fairness of the decision but on time: a fixed interview ends within its allotted slot, while a free one runs for as long as two people digress. Across 900 interviews, five extra minutes each become 75 hours of interview time.
• Keep only what discriminates. A question everyone answers the same way ranks nobody, and keeping it in a process repeated 900 times is a cost with no return.
• Widen the assessor pool, and align it. Some raters are lenient and some are severe, and comparing candidates across the two groups becomes meaningless. The more assessors there are, the more it matters to agree the ruler before starting, which is the work of a performance calibration session applied to hiring, because candidates are allocated to assessors in a way the candidate does not choose.

What happens after the start date, and is folded into the plan

One stage drops out of the hiring calculation entirely because on the surface it is not part of hiring: three hundred people starting work within a short period. What works for welcoming one new joiner does not work for three hundred, and the damage here does not show in the hiring metrics at all. It shows months later.

• The same capacity is asked for twice. The managers who spent half their day assessing are the ones who receive the new hires. The assessment peak and the induction peak follow each other closely, and they often overlap.
• What the process describes must be what the joiner finds. A fast process that describes the role in general terms, because it has no room for detail, creates a gap between expectation and reality, and that gap is one of the strongest reasons people leave in the first months.
• Early leavers restart the calculation. If 50 of the 300 leave within three months, the number required was never 300 but 350, and the hours and the cost are recalculated with it. A hire who leaves within months makes the organisation pay the cost of hiring twice, and here that is multiplied by the headcount.

That is why employee onboarding in this pattern is not what follows the hiring but part of its plan, with its hours counted in the same capacity as the assessment hours. An organisation that counted the first and not the second has counted half the project.

What is measured during the campaign, not after it

A peculiarity of this pattern is that its result appears after the time to correct it has passed. A metric read at the end of the 90 days is of no use. What is read weekly is three numbers: how many people have actually started, against a straight line from zero to 300; how many assessor hours have been used, against the hours available; and the rejection rate at each stage, against what the first calculation assumed. A drift in the third changes the whole calculation while it is still in progress, and it is the most useful thing to learn early.

None of the rates, interview lengths or assessor numbers used above is offered as a standard. They are assumptions made to show how the calculation is built, and we set no conversion rate between funnel stages, no interview length and no number of assessors as a norm. Contract terms and working hours are a separate matter governed by the Saudi Labor Law (نظام العمل) and are read from their own provisions, starting with the English guide to working hours and weekly rest under the Labor Law; nothing about them is borrowed from the concept described here.

Where it gets mistaken for something else

High volume hiring is not a lowering of the selection standard. The standard stays; what changes is how many hours are spent verifying it. An organisation that answers a shortage of capacity by lowering the bar has applied a decision to the wrong constraint, and the effect shows months later in early departures. The same holds for easing what is looked for in a candidate on the grounds that the role is repetitive. Repetition means more is known about what distinguishes a good performer in the role, not less, which is exactly what makes a fixed assessment possible here in a way it rarely is for a single role hired alone.

Taking whoever turns up is a different situation again, the one in which every applicant is hired and selection has nothing left to decide. What an assessment still offers then is knowledge of the training and induction each hire will need.

The pattern is also not a description of company size. A small organisation opening a branch falls into it; a large one hiring scattered individuals does not. Nor is it building a talent pool. A pool is gathered for the future and run under a different constraint: here there are open seats with a known date, there are stored CVs with no seat attached.

Related terms

• Ghost Jobs
• Structured Interview
• Cost per Hire
• Candidate Experience
• Employee Onboarding