Some plan capacity down to three decimal places, calculate occupancy, and tune the schedule until it looks perfect.
And then forget to forecast the single biggest disruptive factor of all… Shrinkage.
Shrinkage determines how much time employees are actually available for customer contact. It is the portion of the workday lost to both planned and unplanned activities. Vacation, training, meetings, coaching, illness, breaks, system issues, internal requests, etc.
Yet in many contact centers, shrinkage is still treated as a fixed percentage that you simply add at the end of the calculation. Something like thirty percent and done. Shrinkage is not a correction. Shrinkage is a forecast. And when it is not forecast, organisations are not planning. They are gambling.
The Part Everyone Tracks and the Part Everyone Hopes Will Behave
Most organisations include planned shrinkage. Vacation allowances, coaching schedules, training calendars. These are known and visible.
The unplanned portion is where the uncertainty lives. It can account for a very large share of the total. And it does not remain still. It shifts with seasonality, employee well-being, over- or understaffing, leadership climate, incidents, campaigns, or system outages.
Some days it moves gently. On others, it swings sharply. This is not random. It follows behavioural patterns in the workforce and structural patterns in the organisation.
A Monday You Have Probably Seen
It is Monday morning. One hundred agents scheduled. Forecast looks stable. Shrinkage accounted for. Confidence is high.
By midday, several agents have called in sick. A few arrived late due to the weather. A supervisor has pulled a small group for an urgent update. A 30-minute outage of the CRM system. Two agents request to leave early.
By the end of the day, a significant amount of productive capacity has disappeared. Service levels fall. Teams feel pressure. The schedule begins to shift under the planners’ hands. None of this was in the plan. Yet it was entirely predictable in hindsight.
When unplanned shrinkage is not forecasted, the plan on paper and the day in reality begin to separate.
Why the Simple Percentage Fails
Treating shrinkage as one number feels efficient. It keeps spreadsheets clean. It makes communication simple. But it compresses dynamic behaviour into a single value.
The result is:
- Chronic under- or overstaffing
- Planners fixing gaps reactively
- Pressure on agents from unrealistic schedules
- Frustrated managers dealing with “unexpected deviations”
Shrinkage behaves like workload. It has trends, patterns, and drivers. And it can be forecast in the same structured way.
From Correction to Forecast
A stronger approach begins with historical data. Instead of assuming a single number, we look for systematic patterns.
- Seasonal influence. For example, illness rising in winter.
- Behavioural trends. Adherence improving or declining over time.
- Event impact. Product launches, migrations, campaigns, or holiday periods.
When these influences are recognised and projected, the unplanned portion becomes something expected rather than something disruptive.
Schedules begin to reflect reality rather than ideal conditions.
What Changes When You Forecast Shrinkage
When shrinkage forecasting is done properly, everything changes:
- Planning becomes more reliable
- Schedules require fewer last-minute repairs
- Service performance stabilises
- Team pressure decreases
- Trust increases across planners, managers, and agents
A forecast without shrinkage forecasting is like navigating with a map that shows the road but not the traffic. You may still reach your destination, but much later and with far more frustration.
How We Approach This at CCmath
At CCmath, shrinkage is modelled as a behavioural pattern. We analyse historical patterns, seasonal waves, long-term shifts, and the impact of operational events. This allows us to estimate the unplanned portion of shrinkage with precision.
In CCschedule, part of CCsuite, this dynamic shrinkage forecast is built directly into scheduling. No last-minute corrections. No hoping for the best. Just schedules that reflect how people actually work.
The result is more stable staffing, a calmer planning environment, and a healthier operation overall.
Conclusion
Shrinkage forecasting is not a detail. It is one of the foundations of reliable planning. When the unplanned portion is treated as something that can be forecast rather than something that simply happens, the gap between planning and reality closes dramatically.
Curious what a solid shrinkage forecast could mean for your contact center?
Send me an email or a message — I’ll gladly share our CCmath approach, no strings attached.