hope this will answer your question.
This is from the FAA's Human Resources Policy Manual (HRPM)
"
Annual Pay Change Process
Step 1: The Management Board establishes strategic goals, corporate projects, and performance targets that support FAA Strategic Plan. From these, specific OSI goals are established and approved by the Administrator at the beginning of each performance year. The performance year runs from October 1 to September 30 of the following year.
There are currently six organizational goals: Safety, Security, System Efficiency, Customer Satisfaction, Financial Responsibility, and People.
Step 2: The FAA Compensation Committee proposes to the Administrator the potential OSI pool by following the Annual Funding formula described above.
Step 3: After the end of the performance year, the Administrator assesses the performance of the agency against the organizational goals and makes a final OSI determination. Based on the assessment,
the Administrator will determine whether to grant the entire available OSI pool for success or a portion of the pool for partial success as the final OSI.
Step 4: Managers will use a streamlined assessment process to identify recipients for each annual pay increase level. There are four possible annual pay increase levels:
- Approximately 20% will get the OSI plus an SCI-1 of 1.8% of base salary
- Approximately 45% will get the OSI plus an SCI-2 of 0.6% of base salary
- Approximately 35% will get the OSI with no SCI
- Ineligible employees will receive no OSI nor SCI
The process for evaluating employees for the SCI component of the annual pay increase will include a Contribution Assessment Decision Aid and other tools, and an employee input capability. SCI decisions will be made at the lowest practical levels, so that to the greatest extent possible, decision-makers will be personally familiar with the employee contributions.
The criteria against which employees will be rated are collaboration, customer service, and impact on organizational success. A fourth criterion ? management and leadership ? will apply only to managers."
In other words, no, it is not guaranteed, it depends on the success of the organization in meeting goals. (thus the name: Organizational Success Increase)