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10 Metrics to Prioritize When Hiring an Inbound Call Center

a group of people sitting at computers checking for Call center metrics

An inbound call center is a critical component of customer service, serving as the primary touchpoint between businesses and their customers. These centers manage incoming calls, resolve issues, and provide the essential support that drives customer satisfaction across industries. However, each business faces its own challenges when selecting an inbound call center provider. For example, some companies may struggle to manage high call volume due to limited staffing, leading to longer wait times and frustrated customers. Others may require a tailored approach with customized service standards that align closely with their brand identity and customer expectations. 

Regardless of these unique needs, assessing the performance of an inbound call center is vital. By analyzing key metrics such as call volume, average handling time, and customer satisfaction scores, businesses can gain valuable insights into the efficiency and quality of their service. This proactive evaluation not only helps identify areas for improvement but also ensures that the call center consistently meets business goals and enhances the overall customer experience

What are Call Center Metrics?  

Call center metrics are essential tools for evaluating the daily performance of call center representatives. They provide detailed insights into critical aspects of the operation, such as the time each agent spends on calls, the number of calls handled per shift, call resolution rates, and customer satisfaction scores. This range of data helps determine whether interactions are successful and if established service standards are being met. For example, tracking the time an agent spends on each call can indicate efficiency, while monitoring the number of calls handled per day may reveal trends in agent productivity. 

Call center managers rely on this comprehensive data to ensure that team goals are consistently achieved and to pinpoint areas where improvements can be made. By keeping a close eye on these metrics, they can make informed decisions that optimize operations and enhance overall performance. Ultimately, when selecting an inbound call center partner, aligning with a provider that leverages these robust performance metrics will not only meet specific customer service requirements but also drive better agent productivity and long-term business success. 

Here are some of those metrics to prioritize when hiring an inbound call center.  

10 Metrics to Prioritize When Hiring an Inbound Call Center  

1. Percentage of Calls Blocked  

This metric measures the percentage of incoming calls that result in a busy signal, indicating that customers are unable to speak with a representative. This can happen when an agent spends too much time on a single call or when the call center software is unable to handle the high call volume. Monitoring the percentage of calls blocked is crucial, as it helps gauge whether an inbound call center can efficiently manage multiple calls and provide timely responses. 

A high percentage of calls blocked signals that many customers are left waiting for assistance, which can lead to frustration and a negative overall customer experience. When selecting an inbound call center, it’s essential to ensure that this metric remains as low as possible. In doing so, you’ll confirm that agents aren’t spending excessive time on individual calls at the expense of handling additional incoming calls, ultimately ensuring a smoother flow of call volume and a higher level of customer satisfaction. 

2. Contact Quality  

Contact quality is a crucial metric that reviews call recordings to determine whether every customer interaction meets the required standards of professionalism and courtesy. This metric is a direct indicator of agent productivity, as it reveals how effectively representatives are managing conversations and delivering accurate information. Call center managers use this valuable data to monitor performance, identify trends, and make informed decisions to enhance overall service quality.  

When contact quality is consistently high, it reassures managers that their team is performing well, which in turn builds customer trust and drives positive outcomes for the business. This ongoing focus on quality helps foster a culture of excellence, ensuring that both agents and the call center as a whole continue to meet and exceed customer expectations. 

3. Occupancy Rate  

Occupancy rate measures the percentage of time call center agents actively engage with customer interactions. Monitoring occupancy rates is essential when assessing inbound call center companies, as it reflects how each agent spends their time on tasks that drive efficiency and productivity. 

High occupancy rates mean that call center agents are making effective use of their scheduled hours, maximizing customer interactions and completing necessary follow-up actions, such as after call work. However, an optimal occupancy rate also ensures that agents are not overwhelmed, which is vital to sustaining both service quality and agent satisfaction. When an inbound call center company maintains a balanced occupancy rate, it contributes to improved customer effort—making interactions smoother and reducing the steps required for customers to get help—while also preventing agent burnout and ensuring consistent, high-quality service delivery. 

4. Average Speed of Answer  

Average Speed of Answer (ASA) is a metric that measures the amount of time an agent takes to answer an incoming call, including the time a customer waits in the queue. This metric provides valuable insight into potential delays, such as when an agent is still occupied on another call or during periods of high call volume. 

A high ASA can indicate that an agent spends longer on each interaction, which might suggest a more personalized approach but can also lead to longer wait times for other customers. Prolonged ASA may leave customers feeling dissatisfied with the service, impacting overall impressions of the call center’s efficiency. Choosing an inbound call center with an optimized ASA helps ensure that customers don’t experience excessive wait times, fostering a more positive customer service experience. 

5. Average Handle Time  

The Average Handle Time (AHT) measures the length of the call, including the time the agent spends from the moment the phone is picked up until the customer and the representative disconnect. 

AHT is a tricky measure because there are different factors why a call may last for too long or not. If the call is too long, it may mean that there’s difficulty resolving the customer’s problem. If a call is too short, it may mean that there’s only a tiny amount of customer effort in addressing the client’s concerns.  

However, you should aim for call centers with low AHT because this means that the call center agents are efficient in handling, addressing, and resolving the needs of the customers.  

a woman wearing corporate attire sitting at a desk with a headset on
Photo by tonodiaz

6. Average Time in Queue  

No one likes to wait, and call center agents often find it challenging to reduce customers’ wait times during days of high call volume. Having customers wait in queue reflects the capabilities of call centers and the kind of customer experience they deliver.   

Average Time in Queue is a measurement of how long callers have to remain in the queue side by side with the total number of calls answered. When this metric is high, it only means that customers wait too long in the queue, causing frustration and abandonment.   

Remember that when hiring an inbound call center, it’s important to consider the amount of time an agent spends on each call. You should be looking for a team that can maximize productivity and accommodate your customers, especially when there is a high call volume. 

7. First Contact Resolution  

First Contact Resolution is a metric that strives to resolve a customer’s concern within the first call. Call center managers also oversee this process, making it a measurement of a representative’s effectiveness and the company’s success in satisfying customers without asking for a callback. 

That is why it’s most definitely a metric to prioritize because it does not only manifest splendid inbound call center service, but customer satisfaction extends to your entire company. There will be an increase in trust, and with conviction follows loyalty.   

When you have acquired representatives who have excellent communication and problem-solving skills, your company will receive positive customer experience feedback and will increase the number of customers who want to establish a relationship with your company.   

8. Call Abandonment Rate  

The number of customers who frequently hang up before a representative can attend to their call determines the rate of abandonment. It’s usually a sign that a customer is unhappy to the point of hanging up.  

Call abandonment may indicate that there are not enough representatives handling incoming calls or that they cannot keep up with the high call volume. While it may not sound like a problem, especially for small businesses, it’s still important to consider this metric. It helps you decide how many call center agents you need for your company and ensures that abandoned calls will not be a dilemma in the future. 

9. Missed and Declined Calls  

Missed calls are when representatives fail to answer in time, so the customer tends to be sent back to the queue. Declined calls are when call center agents refuse to answer the call because they might still be on another call, impacting overall agent productivity. 

This should be one of the metrics to prioritize because it gives you a heads-up that customers are not being accommodated. Which is one of the leading causes of their losing patience and overall loyalty to the company.    

The inbound call center company you should hire must be alert to this metric because it identifies the root cause of missed and declined calls—whether on the call center agents’ capabilities or the call center software’s limits—and so ensures that customer satisfaction does not decrease.  

10. Customer Satisfaction  

This should be part of the metrics to prioritize because call center managers and agents understand that customer satisfaction is always the goal at the end of the day. It’s not just about asking the customers how satisfactory their experience was with a representative, but with the overall company.   

This could easily be done through a survey, and the results would significantly affect your company’s plans for improvement. Not only does the result challenge the call center agents and the company itself, but it may also inspire employees to continue growing in their roles.  

Once customer satisfaction is achieved, rest assured that your company will see a significant increase in potential customers, along with positive feedback on how well they were accommodated. 

Seal the Deal with the Right Call Center Metrics 

When choosing an inbound call center, it’s crucial to keep key industry-standard metrics in mind. These metrics not only help you select the company that best fits your business needs but also provide ongoing insights into your team’s performance. By continuously tracking and analyzing these metrics, you can ensure that your representatives meet expectations, maintain high levels of customer satisfaction, and drive overall business growth. 

In essence, effective call center metrics are more than just numbers—they are a powerful tool for assessing the effectiveness of your customer support team and fostering continuous improvement. With the right insights, you can confidently select a call center partner that will help seal the deal for long-term success. 


Frequently Asked Questions (FAQs) 

Q1: What does the “Percentage of Calls Blocked” metric indicate in an inbound call center? 

The ‘Percentage of Calls Blocked’ metric indicates the proportion of incoming calls that are unable to reach an agent due to full capacity or other issues. A high percentage of blocked calls suggests that the call center may be understaffed or experiencing technical problems,  leading to customer frustration and potential loss of business. This metric is critical for assessing the efficiency, reliability, and overall agent productivity of an inbound call center. 

Q2: What is the significance of the “Average Speed of Answer (ASA)” metric in call center operations? 

The “Average Speed of Answer (ASA)” metric measures the average time it takes for a call to be answered by an agent, directly influencing agent productivity. This metric is significant because it directly impacts customer satisfaction; shorter ASA times lead to happier customers and lower abandonment rates, while longer ASA times can result in frustration and lost business. Monitoring and optimizing ASA helps ensure efficient call handling and a positive customer experience. 

Q3: How does “First Contact Resolution” affect customer loyalty in inbound call centers? 

“First Contact Resolution” (FCR) is crucial for customer loyalty because it measures the ability to resolve customer issues in a single interaction. In addition, call center managers use FCR rates to gauge and improve service efficiency. High FCR rates lead to increased customer satisfaction, as customers appreciate prompt and efficient service. This positive experience enhances trust and loyalty, making customers more likely to return and recommend the business to others. Conversely, low FCR rates can lead to repeat calls, frustration, and diminished customer loyalty. 

Q4: Why is “Missed and Declined Calls” a critical metric to consider when hiring an inbound call center? 

“Missed and Declined Calls” is a crucial metric because it directly impacts customer satisfaction and business opportunities. High rates of missed or declined calls can lead to frustrated customers, lost sales, and a damaged reputation. By considering this metric, businesses can ensure they choose an inbound call center that effectively manages a high call volume, minimizes missed opportunities, and provides reliable customer service.  

Q5: How does “Customer Satisfaction” impact business growth and reputation in inbound call centers? 

Customer satisfaction plays a pivotal role in driving business growth and shaping a strong reputation in inbound call centers. When customers are satisfied, they are more likely to remain loyal, recommend the business to others, and contribute to repeat sales. Positive experiences not only enhance a company’s reputation but also attract new clients and bolster credibility. In contrast, poor satisfaction can result in negative reviews, higher churn rates, and sluggish growth. By consistently meeting customer expectations, businesses can foster long-term success and solidify their brand’s reliability. 

Q6: What steps should businesses take to partner with inbound call centers that consistently deliver high satisfaction rates? 

To partner effectively with inbound call centers that deliver high satisfaction rates, businesses should define clear customer service goals, assess the center’s experience and technology, and ensure a proven track record in similar industries. Reviewing training programs, maintaining open communication for feedback, and setting service level agreements (SLAs) with performance metrics will help align efforts and drive continuous improvement. 

Q7: How do Inbound call center managers improve customer satisfaction? 

Inbound call center managers improve customer satisfaction by training agents to provide excellent service, monitoring call quality, and addressing issues promptly. They also analyze customer feedback to identify areas for improvement and implement strategies to enhance the overall customer experience. 


At the core of great customer support are the right metrics, ensuring each interaction is tailored and seamless, building strong, lasting relationships. 

One CoreDev IT (CORE) is here to connect you with skilled customer service professionals who treat every inquiry with excellent care and top-tier expertise. Contact us today, and let’s make it happen! 

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