An operational level agreement (OLA) is a contract that defines how various IT groups within a company plan to deliver a service or set of services. OLAs are designed to address and solve the problem of IT SILOS by setting forth a specific set of criteria and defining a specific set of IT services to be performed by each department.
It should be noted that the term Service Level Agreement (SLA) is used in many companies while discussing agreements between two INTERNAL groups. However, according to Information Technology INFRASTRUCTURE Library (ITIL) framework for best practices, this type of internal contract should is better known as an Operational Level Agreement.

An operational level agreement (OLA) is a contract that defines how various IT groups within a company plan to deliver a service or set of services. OLAs are designed to address and solve the problem of IT silos by setting forth a specific set of criteria and defining a specific set of IT services to be performed by each department.
It should be noted that the term Service Level Agreement (SLA) is used in many companies while discussing agreements between two internal groups. However, according to Information Technology Infrastructure Library (ITIL) framework for best practices, this type of internal contract should is better known as an Operational Level Agreement.