An objective, formally known as an Operational Level Agreement (OLA), is a requirement that must be met. A series of objectives make up a Service Level Agreement (SLA).
To define objectives:

Section 5.1, Understanding Objectives

Section 5.2, Creating an Objective

Section 5.3, Understanding Activation and Deactivation Dates

Section 5.4, Understanding Time Intervals

Section 5.5, Setting the Threshold Condition

Section 5.6, Defining an Incidents Objective

Section 5.7, Defining an Outages Objective

Section 5.8, Defining the Downtime Objective

Section 5.9, Defining the Availability Objective

Section 5.10, Understanding the Calculation Objective

Section 5.11, Calculation Objective for Property or Alarm Severity

Section 5.12, Calculation Objective for External Database

Section 5.13, Agreement Objective