Definition · Contact centre and BPO
Hiring Wave
Definition
A hiring wave is a group of new hires who start on the same day and go through training together as one class. Contact centers, BPOs, warehouses and retailers hire in waves because training is delivered to a cohort, so the recruiting goal is to fill every seat in each class by its start date.
Also called: Training class, New hire class, Batch hiring, Cohort hire
Formula
Class fill rate = Hires who start on day one ÷ Seats planned for the class × 100
- Hires who start on day one
- New hires who actually show up for the first day of training, not accepted offers.
- Seats planned for the class
- The class size agreed with operations and training, based on the capacity plan.
Worked example
A wave is planned for 30 seats. Recruiting extends 41 offers, 36 are accepted and 28 people show up on day one. Class fill rate = 28 ÷ 30 × 100 = 93%. Next wave, with the same 78% offer-to-start ratio (28 ÷ 36), recruiting needs about 39 accepted offers to fill 30 seats.
How a hiring wave works
Operations sets the number of seats from the capacity plan, training sets the start date and class size limits (often 15 to 30 per trainer), and recruiting works backward from day one. A typical calendar for a voice program:
- Weeks 1 to 3 before start: sourcing, screening, assessments and interviews.
- Weeks 1 to 2 before start: offers, background checks and drug tests where required.
- Final week: onboarding paperwork, equipment shipping for remote agents, day-one reminders.
- Weeks 1 to 4 after start: classroom new hire training, then nesting on live calls.
A 250-seat center replacing 4% of agents a month and growing slightly might run one 30-person wave every four weeks. A contact center ramp-up for a new client can run two or three overlapping waves a week.
Planning for drop-off
Every wave loses people at each stage, so recruiting overbooks. The losses to plan for:
- Offer to start: reneges and no-shows on day one, often 10% to 25% for entry-level hourly roles.
- Training: training attrition, typically higher in the first week than any later week.
- Nesting: agents who fail certification or quit on their first live calls.
If a client needs 25 production-ready agents and history says 85% of starters graduate, the class needs 30 starters, and at the offer-to-start ratio in the example above, about 39 accepted offers. Hold a small waitlist of approved candidates who can start on short notice to fill late no-shows.
Common mistakes
Letting the start date slip because a class is three people short usually costs more than starting light, because the trainer, the room and the next wave are already booked. Measuring recruiters on offers accepted rather than day-one starts hides the no-show problem. And overfilling a class beyond the trainer's capacity pushes quality problems into nesting.
The biggest gains usually come from shortening time between offer and start. Every extra week a candidate waits for a class raises the chance they accept another job, so keep the gap under two weeks where background check turnaround allows, and stay in touch by text during it. Track fill rate and no-show rate by wave so the overbooking factor reflects current reality.
Frequently asked questions
What is a hiring wave in a call center?
A group of new agents hired to start training on the same date as one class. Centers schedule waves to match forecast demand and training capacity.
What is class fill rate?
The share of planned training seats filled by people who actually start on day one. It is calculated as day-one starts divided by planned seats, times 100.
How many candidates do you need to fill a training class?
Divide the seats by your historical offer-to-start ratio. With 30 seats and a 78% ratio you need about 39 accepted offers, plus a short waitlist.
What is batch hiring?
Hiring many people for the same role at once so they can be onboarded and trained together, common in contact centers, warehouses and retail.
How often should a contact center run hiring waves?
It depends on attrition and growth. Steady-state centers often run a class every two to four weeks, while program launches can run several waves a week.