Call Volume

What is Call Volume?

Call volume refers to the number of incoming or outgoing calls a contact centre handles or receives during a specific period. Businesses measure call volume by hour, day, week, month or another reporting interval to understand customer demand and plan their operations.

In a contact centre, call volume helps managers identify busy periods, forecast staffing needs and assess how customer demand changes over time. A sudden increase in calls may indicate a product issue, a billing problem, a marketing campaign or a seasonal increase in enquiries.

Contact centres commonly track several types of call volume:

• Inbound call volume: The number of calls customers make to the business.
• Outbound call volume: The number of calls agents or automated dialling systems make to customers or prospects.
• Handled calls: The number of calls agents answer and handle.
• Offered calls: The number of calls presented to a contact centre or queue, based on the platform's reporting definition.
• Missed or abandoned calls: Calls that agents do not answer or that customers leave before reaching an agent, depending on the metric being measured.

These measures are related, but they are not interchangeable. For example, a contact centre may receive 1,000 inbound calls but handle fewer than 1,000 because some callers abandon the queue or calls go unanswered.

Call volume is an important contact centre metric because it affects staffing, waiting times, service levels and agent workload. However, volume alone does not explain how difficult calls are to handle or whether customers receive satisfactory outcomes.

How Does Call Volume Work?

Contact centres measure call volume by collecting call activity data from their telephony or contact centre platforms. Managers review the data across different periods to understand demand and make operational decisions.

How to Calculate Call Volume

Call volume is generally a count rather than a percentage or average.

Formula:

Total Call Volume = Number of Calls Recorded During the Selected Period

For example, suppose a contact centre records the following inbound calls during one working day:

• Morning: 350 calls
• Afternoon: 450 calls
• Evening: 200 calls

Total daily call volume = 350 + 450 + 200 = 1,000 calls

The contact centre received 1,000 calls during the reporting period, assuming these figures represent distinct calls recorded under the same definition.

How to Calculate Average Call Volume?

Businesses can calculate average call volume across several days to understand typical demand.

Formula:

Average Daily Call Volume = Total Calls During the Period ÷ Number of Days in the Period

For example, if a contact centre receives 5,000 calls over five operating days:

Average Daily Call Volume = 5,000 ÷ 5 = 1,000 calls per operating day

This average helps with planning, but it does not show when calls arrive. A team may receive far more calls on Monday than Friday, so managers should also review daily and hourly patterns.

How to Calculate Call Volume Growth?

Contact centres may compare call volume across two periods to identify changes in demand.

Formula:

Call Volume Growth (%) = ((Current Period Volume − Previous Period Volume) ÷ Previous Period Volume) × 100

For example, call volume increases from 800 calls per day to 1,000 calls per day.

Growth = ((1,000 − 800) ÷ 800) × 100 = 25%

The contact centre experienced a 25% increase in daily call volume compared with the previous period.

Managers should compare equivalent periods and consider seasonal changes, operating hours and unusual events before interpreting the result.

What Factors Affect Call Volume?

Several factors can increase or decrease call volume:

• Seasonal demand: Holidays, sales periods and annual events can change customer enquiry patterns.
• Marketing campaigns: Promotions and new product launches may encourage more customers to call.
• Product or service issues: Outages, billing errors and delivery delays can trigger a surge in enquiries.
• Customer communication: Unclear instructions or missing information may lead customers to contact support.
• Self-service options: Effective FAQs, account portals and automated support may reduce calls for routine enquiries.
• Business changes: Pricing updates, policy changes and service launches may generate additional questions.
• Customer behaviour: Changes in customer preferences or channel usage can affect how many people call.
• Repeat contacts: Customers may call again when their initial issue remains unresolved.

Understanding these factors helps contact centres distinguish normal demand from unexpected increases that require investigation.

Call Volume in Practice

Contact centres use call volume data to plan staffing, manage customer demand and identify recurring operational issues.

Customer Service Operations

A customer service team may receive more calls at the beginning of the week when customers follow up on weekend enquiries. Managers can use historical call patterns to schedule enough agents during these busy periods.

If actual call volume rises above the forecast, supervisors can review queue conditions and adjust available resources where possible.

Technical Support

A product outage or system failure can trigger a sudden increase in inbound calls. By monitoring call volume, support managers can recognise the spike, allocate available technical staff and share accurate updates through appropriate channels.

They can also compare call volume with incident records to understand how service disruptions affect customer demand.

Sales and Outbound Campaigns

Outbound contact centres track call volume to understand campaign activity. Managers may monitor the number of calls attempted, calls connected and conversations completed.

These measures help explain campaign performance, but high outbound call volume does not automatically mean high sales. Teams should also review connection rates, conversion rates, contact rules and customer outcomes.

Workforce Management

Workforce Management (WFM) teams use historical call volume to forecast demand and plan agent schedules. Hourly and interval-based data can reveal when demand usually peaks and when fewer agents may be needed.

Managers should combine call volume with Average Handle Time (AHT), agent availability and the required service level when calculating staffing needs.

Identifying Customer Experience Problems

An unusual increase in calls about the same issue may indicate a wider problem. For example, a rise in billing enquiries after a statement run may suggest that customers need clearer explanations.

Contact centres can categorise calls by reason and compare changes over time. This helps businesses address the underlying problem instead of treating every call as an isolated interaction.

How to Manage High Call Volume

Contact centres can manage high call volume through better planning and process improvements.

1. Forecast demand: Use historical data and known business events to anticipate increases.
2. Align staffing with demand: Schedule suitable agent coverage during expected peak periods.
3. Monitor calls in real time: Track queue volumes, waiting times and service levels to identify pressure early.
4. Improve self-service: Make common answers and simple account actions available through useful, easy-to-navigate channels.
5. Resolve repeat-contact causes: Investigate why customers call more than once about the same issue.
6. Improve routing: Direct callers to the right team without unnecessary transfers.
7. Prepare for incidents: Create response plans for outages, campaigns and other events that may increase demand.
8. Review performance after peak periods: Compare forecasts with actual volume and use the findings to improve future planning.

The objective is not simply to reduce the number of calls. Contact centres should make it easier for customers to get accurate help through the channel that best suits their needs.

Industry Standards and Key Metrics of Call Volume

Call volume is a foundational contact centre measure, but there is no universal call volume benchmark that applies to every business. Demand varies according to industry, customer base, operating hours, service complexity, contact channels and business model.

A small specialist support team may receive relatively few calls that require extensive troubleshooting. A large customer service operation may handle thousands of routine enquiries each day. Comparing their total call volumes without considering these differences would provide little useful insight.

What Should Contact Centres Benchmark?

Rather than focusing only on the total number of calls, managers should review call volume in context.

• ‍Historical call volume: Compare current demand with previous periods to identify growth, seasonal patterns and unusual changes.‍
• Forecast accuracy: Compare expected call volumes with actual volumes to assess how well the business predicts demand.‍
• Calls by interval: Review calls by hour or shorter intervals to identify peaks that daily averages may hide.‍
• Call reason: Group calls by topic to identify recurring customer questions, complaints or service problems.‍
• Call handling capacity: Review volume alongside AHT, staffing and service level to understand whether the team can meet demand.‍
• Channel mix: Compare calls with email, live chat, messaging and self-service activity to understand how customers use different support channels.

How to Identify an Unusual Increase in Call Volume?

Contact centres can compare current call patterns with a suitable historical baseline. For example, managers may investigate if Monday morning volume rises well above the normal range for similar Mondays.

Before deciding that the increase signals a problem, they should consider planned campaigns, seasonal demand, changes in opening hours and other known events.

They can then review call reasons, queue waiting times, abandonment rates and customer feedback to determine whether the change requires action.

Why Call Volume Alone Is Not Enough?

A high call volume does not necessarily mean that a contact centre performs poorly. It may reflect business growth, a successful campaign or increased customer demand.

Likewise, a low call volume does not automatically indicate efficiency. It may result from fewer customers needing support, a temporary outage in the calling system or customers abandoning calls before they enter the measured queue.

For a balanced view, contact centres should combine call volume with operational and customer experience metrics.

APQC offers resources for comparing contact centre operations and related performance measures. Businesses should check each benchmark's definition and comparison group before applying it to their own operation.

Call Volume and Contact Centre Technology

Contact centre technology helps businesses collect call data, identify demand patterns and respond to changes in customer activity.

Contact Centre Platforms

Contact centre platforms record call activity and may provide reports on inbound calls, outbound attempts, answered calls, abandoned calls and queue performance.

The available measures depend on the platform and its reporting configuration. Managers should understand how the system defines each metric before using the data for planning.

Automatic Call Distribution (ACD)

An Automatic Call Distribution (ACD) system routes incoming calls to queues or agents according to configured rules. ACD data can help managers understand how calls move through the contact centre and where queues experience pressure.

Workforce Management Software

WFM software uses historical contact volumes and other operational data to support forecasting and agent scheduling. When teams combine call volume with AHT and service targets, they can estimate staffing requirements more effectively.

Interactive Voice Response (IVR)

An Interactive Voice Response (IVR) system allows customers to select options or complete certain tasks before reaching an agent. An effective IVR can route calls to the appropriate team or help customers complete straightforward requests through self-service.

Businesses should review IVR performance carefully. A poorly designed menu can frustrate customers, encourage repeat calls or make it difficult to reach a suitable agent.

CRM and Call Analytics

Customer Relationship Management (CRM) systems can help businesses connect call activity with customer records and case histories, subject to the available integration and data permissions.

Call analytics can help teams identify patterns in call reasons, customer questions and recurring issues. These insights can support improvements to staffing plans, customer communications and support processes.

Outbound Dialler Software

Outbound dialler systems help contact centres manage outbound calling activity. Depending on the system, they may support campaign lists, call attempts, agent availability and reporting.

Managers should distinguish between calls attempted, calls connected and meaningful customer conversations. These measures answer different questions about campaign performance.

Automation and Self-Service

Automation can help customers complete routine tasks or find answers without speaking to an agent. This may reduce some types of inbound call demand, although its effect depends on whether the solution meets customer needs.

Contact centres should monitor call volume alongside self-service completion, repeat contacts and customer satisfaction to ensure that automation genuinely helps customers.

How Kaizn Applies Call Volume?

Managing call volume effectively requires more than counting incoming and outgoing calls. Contact centres need reliable data, suitable forecasting methods and technology that supports staffing decisions and customer interactions.

Kaizn focuses on contact centre technology and helps businesses assess, select and implement solutions that fit their operational requirements. When reviewing call volume management, contact centre leaders can consider:

• Data and reporting: Assess whether existing systems provide clear, consistent information about calls received, answered, abandoned and handled.
• Forecasting requirements: Identify how historical call data can support demand planning and workforce scheduling.
• Platform integration: Review how contact centre technology connects with WFM, CRM and other operational systems.
• Routing and queue management: Examine whether call routing supports the business's team structure, customer needs and operating model.
• Self-service opportunities: Identify routine enquiries that customers could resolve through appropriate digital channels.
• Operational visibility: Review whether managers can identify demand spikes and understand their effect on service levels and waiting times.

The right approach depends on the contact centre's existing technology, customer demand, staffing model and business goals. Technology should help teams understand and manage call volume rather than encourage them to reduce calls at the expense of customer support.

FAQs

What does call volume mean in a contact centre?

Call volume is the number of calls a contact centre receives, makes or records during a defined period. Businesses track it by hour, day, week or month to understand demand and plan staffing.

How do you calculate call volume?

Call volume is calculated by counting the calls recorded during a specific period. For average daily call volume, divide the total number of calls by the number of days included in the measurement.

What is the difference between inbound and outbound call volume?

Inbound call volume counts calls customers make to a business. Outbound call volume counts calls agents or calling systems make to customers or prospects. Contact centres may also track attempted calls, connected calls and calls handled separately.

Why is call volume important?

Call volume helps contact centres forecast demand, schedule agents, manage queues and identify changes in customer behaviour. When combined with other metrics, it helps managers understand whether staffing and processes meet customer needs.

What causes high call volume?

High call volume can result from seasonal demand, marketing campaigns, product issues, billing questions, unclear communications, repeat contacts or changes in customer behaviour. Reviewing call reasons helps identify the cause of an increase.

How can contact centres reduce call volume?

Businesses can reduce avoidable calls by improving self-service, clarifying customer communications, resolving recurring product or service issues and making support processes easier to use. They should not discourage customers from calling when they need assistance.

What is the difference between call volume and call handling time?

Call volume measures the number of calls during a period. Call handling time measures how long agents spend handling individual calls, generally including talk time, hold time and applicable after-call work when used in AHT calculations. Both measures help determine staffing requirements.

How does call volume affect workforce management?

Call volume is a key input for workforce forecasting and scheduling. When demand rises, contact centres may need additional agent capacity. WFM teams also consider handling times, service targets, agent skills and availability before deciding how many agents to schedule.

What is the difference between call volume and contact volume?

Call volume counts calls. Contact volume can include a broader range of customer interactions, such as phone calls, live chats, emails and messages. The exact meaning depends on how the business defines and reports each channel.

How can technology help manage call volume?

Contact centre platforms, ACD systems, WFM software, analytics and self-service tools can help businesses monitor demand, plan staffing, route calls and identify recurring customer issues. The results depend on data quality, system configuration and how teams use the information.

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