According to the PMBOK® Guide and the Standard for Project Management, specifically within the Develop Team process of the Project Resource Management Knowledge Area, rewards and recognition are used to motivate and reinforce desirable behavior.
As per PMI standards, a reward is only effective if it satisfies a need that is valued by that individual. This concept is rooted in several motivational theories recognized by PMI, such as Vroom’s Expectancy Theory, which posits that individuals are motivated to act in a certain way based on the expectation that the act will be followed by a given outcome and on the attractiveness of that outcome to the individual (valence). Key principles of effective rewards include:
Cultural Sensitivity: Rewards must be appropriate within the cultural context of the team member.
Individual Preference: What motivates one person (e.g., public recognition) might demotivate another (who may prefer a private " thank you " or a flexible work schedule).
Link to Performance: There must be a clear connection between the performance and the reward.
Timeliness: Ideally, rewards should be given throughout the life cycle of the project, not just at the end, to maintain momentum.
The other options are incorrect based on the following PMI human resource management principles:
Given immediately after the project is completed: Waiting until the project is finished is often too late to reinforce behaviors effectively. PMI recommends that recognition and rewards occur throughout the project life cycle.
Something that is tangible: Rewards do not have to be tangible (like money or gifts). Intangible rewards, such as public praise, increased responsibility, or a letter of recommendation, are often equally or more effective.
Formally given during project performance appraisals: While appraisals are a formal time for feedback, effective rewards should be given whenever the desired behavior occurs to be most impactful. Restricting rewards to annual or phase-end appraisals diminishes their motivational value.
As per the PMI Lexicon of Project Management Terms, the goal of the reward and recognition system is to create a positive work environment that encourages the team to achieve project objectives.