What are Service Level Indicators (SLIs)?

What are Service Level Indicators (SLIs)?

Service Level Indicators (SLIs) are specific metrics that quantify the level of service a company offers to its customers. These metrics are typically expressed as percentages, with 0% indicating poor performance and 100% signifying excellent performance. SLIs form an integral part of Service Level Objectives (SLOs), which in turn are components of Service Level Agreements (SLAs).

• Response Time: This is the time it takes for a system to respond to a request. It's a key indicator of the system's performance.
• Error Rate: This measures the percentage of errors that occur during a specific period. A lower error rate indicates a more reliable system.
• Throughput: This refers to the number of units that can be handled or processed by a system in a given time period.
• Request Latency: This is the delay between a request being made and the response being received.
• Availability: This measures the ability of a system to be in a state to perform its designated function when required.

How are SLIs measured?

SLI measurements are usually aggregated, which means that raw data is gathered over a specific measurement window and then converted into a rate, average, or percentile. For instance, the service level formula for a contact center is the number of calls answered within the service level threshold divided by the total number of calls offered, then multiplied by 100.

• Rate: This is a measure of the frequency of a particular event in a set population or sample size.
• Average: This is a measure of central tendency, which is a location in a data set.
• Percentile: This is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall.

What is the role of SLIs in decision making?

SLIs play a crucial role in helping engineering teams make informed decisions. However, SLIs alone cannot determine if a system is reliable. SLOs are necessary to understand what was promised and where the system stands in relation to that promise. SLOs should be clearly defined so that SLIs can be used to measure success in meeting system objectives.

• Reliability: This is the ability of a system or component to perform its required functions under stated conditions for a specified period of time.
• Service Level Objectives (SLOs): These are specific measurable characteristics of the SLA such as availability, throughput, and response time.
• Service Level Agreements (SLAs): These are negotiated agreements between the customer and the service provider that define the services provided and the expectations of the service provider.

How do SLIs relate to SLOs and SLAs?

SLIs are part of Service Level Objectives (SLOs), which are part of Service Level Agreements (SLAs). SLOs are needed to know what was promised and where the system stands in relation to that promise. SLOs should be clearly defined so that SLIs can be used to measure success in meeting system objectives.

• Service Level Indicators (SLIs): These are specific metrics that measure the level of service a company provides to its customers.
• Service Level Objectives (SLOs): These are goals set by the company regarding the level of service they aim to provide.
• Service Level Agreements (SLAs): These are contracts between a service provider and a customer that specify the level of service that the customer will receive.

Why are SLIs important in customer service?

SLIs are used to track the performance and reliability of a customer service team by tracking key indicators such as response time, error rate, throughput, request latency, availability, and durability. These metrics help to ensure that the service team is meeting the company's service level objectives and providing a high level of service to customers.

• Performance Tracking: This involves monitoring and measuring the effectiveness and efficiency of a system.
• Reliability: This is the ability of a system or component to perform its required functions under stated conditions for a specified period of time.
• Customer Satisfaction: This is a measure of how products and services supplied by a company meet or surpass customer expectation.

What is the impact of SLIs on system objectives?

SLIs help in measuring the success of meeting system objectives. They provide quantifiable data that can be used to assess whether the system is meeting its intended goals. However, it's important to note that SLIs are just one part of the equation. They need to be used in conjunction with SLOs and SLAs to provide a comprehensive overview of system performance.

• System Objectives: These are the goals that a system aims to achieve.
• Quantifiable Data: This is data that can be measured or expressed in numerical terms.
• System Performance: This is the effectiveness with which a system achieves its intended purpose.