Workforce Management (WFM) in Call Centres: What It Is, How It Works & Why It Matters

What is Workforce Management in a Call Centre?

Call centre Workforce Management (WFM) is the end-to-end process of planning, scheduling, monitoring and optimising staffing to meet customer demand at the lowest sustainable cost.

It covers everything from analysing historical data and forecasting call volumes, through to building rosters, managing intraday changes, tracking adherence and feeding performance results back into the next planning cycle.

In practice, WFM is the discipline that connects your service level and customer experience goals with the number of people you hire, roster and coach.

Core Functions of Call Centre Workforce Management

Although every operation structures WFM a little differently, most call centres rely on the same core functions.

Some organisations talk about Workforce Optimisation (WFO) or Workforce Engagement Management (WEM), which typically extend WFM to include quality, coaching, surveys and performance management. WFM is the operational backbone within that wider ecosystem.

The Call Centre Workforce Management Lifecycle

WFM is not a one-off activity; it is a continuous cycle. The diagram below shows a simplified lifecycle that many call centres follow.

Different WFM platforms may label these steps differently, but the logic stays the same: data → forecast → capacity → schedules → manage the day → learn.

Forecasting in Workforce Management

Forecasting is one of the most critical and misunderstood parts of WFM. The goal is to predict how many contacts will arrive in each interval (for example, every 15 or 30 minutes), and how long they will take to handle.

What influences call centre forecasts?

Contact volumes are shaped by a mix of regular patterns and specific events:

• Regular patterns: day-of-week and time-of-day cycles, billing cycles, public holidays, school terms, marketing cadences and recurring events such as rate changes or product renewals.
• Business-specific events: launch campaigns, system changes, outages, policy updates, new product releases, seasonal peaks (for example, tax time, sales periods) and planned price or fee changes.
• External factors: economic news, regulatory changes, weather events or issues affecting your supply chain or competitors.

Forecasting methods

Many call centres still start their forecasting journey in spreadsheets. Modern WFM platforms, however, incorporate built-in forecasting models so planners don’t need to be statisticians to get reliable results.

Common approaches include:

• Time series models such as Holt-Winters / triple exponential smoothing, which handle trend and seasonality.
• ARIMA models (Auto-Regressive Integrated Moving Average) for more advanced time series analysis.
• Machine learning techniques including neural networks that can pick up complex patterns and anomalies.
• Multiple temporal aggregation, which combines insights from different time scales to improve accuracy.

For those who want to dive deeper into forecasting theory, here are some external resources often referenced in call centre planning circles:

• Holt-Winters Forecasting Simplified
• Introduction to ARIMA Forecasting
• Intraday Call Centre Forecasting Using Neural Networks
• Improving Forecasting via Multiple Temporal Aggregation

Regardless of the method, the fundamentals don’t change: use good data, understand your drivers and regularly compare forecasts with actuals so you can recalibrate.

WFM Tools, Erlang & Technology

The technology you use for Workforce Management can range from simple spreadsheets to fully integrated cloud platforms.

Benefits of Implementing Workforce Management

Because people costs typically represent the majority of call centre spend, even small improvements in WFM have a big impact. Some of the key benefits include:

• Predictable service levels: Reliable forecasting and scheduling help you hit your service level and response time targets more consistently, reducing customer wait times and abandoned calls.
• Controlled staffing costs: Matching staff numbers to demand reduces both over-staffing (people being paid to sit idle) and under-staffing (overtime, burnout and firefighting).
• Happier agents: Fair, transparent rosters and sustainable occupancy levels support wellbeing, reduce burnout risk and can lower turnover.
• Better use of contact centre technology: WFM data feeds into routing, CTI, quality and analytics, ensuring the broader technology stack is used to its full potential.
• Improved planning and collaboration: Clear visibility of capacity, constraints and demand patterns supports conversations with finance, HR and the wider business about recruitment, campaign timing and change impacts.
• Higher customer satisfaction and loyalty: When the right number of skilled people are available, interactions feel smoother, queues are shorter and customers are less likely to churn after a bad experience.

FAQ: Workforce Management in Call Centres

• Is WFM only about call volume and staffing numbers? No. While forecasting and scheduling are core, effective WFM also considers skills, multichannel workloads, staff preferences, shrinkage, adherence, seasonality and change impacts from across the business. In practice it’s the framework that connects customer demand, CX targets and the way you deploy your people day-to-day. ACXPA Members can use templates and simulators in the WFM Hub to pull these elements together in a consistent way.
• Do small call centres need dedicated WFM software? Not always. Smaller teams often start with spreadsheets and a simple Erlang calculator to get a baseline plan. As complexity grows (multi-site, multi-skill, hybrid working, larger teams), dedicated WFM tools become more valuable and usually pay for themselves quickly. The WFM Hub includes calculators, planning templates and explainer guides that help you bridge the gap between “Excel only” and a full WFM platform.
• What data does WFM depend on? Key inputs include contacts offered, Average Handling Time, service levels, abandon rates, shrinkage (planned and unplanned), staffing numbers, schedule adherence and any known business events that affect demand. Many centres also feed in digital channel volumes, quality scores and sales/retention results. Members can use the data-mapping checklists and planning tools in the WFM Hub to make sure they are capturing the right inputs.
• How often should forecasts be updated? Many centres run rolling weekly and monthly forecasts, with daily or intraday updates for volatile environments. The more dynamic your business and marketing calendar, the more frequently forecasts should be reviewed. Scenario-planning tools in the WFM Hub can help you test the impact of new campaigns, seasonality and policy changes before they go live.
• What is the relationship between WFM and shrinkage? Shrinkage represents the proportion of paid time that agents are not available to handle contacts (for example, breaks, training, leave, sickness). WFM must model and track shrinkage accurately; otherwise, you will under- or over-forecast the staff you need. ACXPA’s WFM Hub includes advanced shrinkage calculators that separate planned and unplanned shrinkage and let you model different “what-if” scenarios.
• How does WFM support hybrid or work-from-home models? WFM tools can handle flexible work patterns, at-home agents, different time zones and virtual teams. Clear schedules, adherence monitoring and good communication are essential when people are not physically in the same location. The WFM Hub provides practical guidance and tools for designing rosters, occupancy targets and real-time playbooks that work in hybrid environments.
• Does WFM only apply to voice? No. Modern WFM covers all customer contact channels: voice, email, chat, messaging and social. Each channel may have different handling times and arrival patterns, but the planning principles are similar: forecast, staff, monitor and refine. In the WFM Hub you’ll find resources that help extend traditional voice-centric planning to true omnichannel operations.
• Is WFM the same as Workforce Optimisation (WFO) or Workforce Engagement Management (WEM)? WFO/WEM usually include WFM plus quality, call recording, coaching, performance management and sometimes surveys. WFM is the planning and staffing component within that broader set. The WFM Hub focuses on the planning, forecasting and intraday disciplines, while ACXPA’s wider resources connect WFM to benchmarking, CX design and leadership practices.