The 360-degree method is a performance appraisal tool that collects feedback from an employee's supervisors, peers, subordinates, and sometimes external customers. This comprehensive approach provides a multi-dimensional view of an employee's performance, which is more holistic than traditional top-down supervisor-only evaluations.

A points-based rating system relies on quantitative data to assess job value or performance. For such a system to be effective and credible, the underlying data must be comprehensive, dependable, and consistent. Without accurate and reliable information, the point values assigned will be arbitrary, leading to unfair outcomes. While impartiality and coordination are important, the integrity of the data is the foundational requirement for the system's validity.

Performance management is no longer viewed as a static, annual administrative event. It is now considered an ongoing, continuous cycle that involves setting goals, providing regular feedback, coaching, and evaluating performance throughout the year. This approach ensures that employees remain aligned with organizational objectives and receive timely support for their professional development.

In small organizations, the close proximity between management and staff often allows for informal performance appraisals. These are continuous, day-to-day evaluations based on direct observation and interaction, rather than the structured, periodic, and documented processes required in larger, more complex organizational hierarchies.

The forced distribution method requires raters to categorize employees into a predetermined distribution (e.g., a bell curve). This prevents 'leniency bias' or 'central tendency bias' by forcing managers to differentiate between top, average, and low performers, thereby establishing a more standardized and objective comparison across the workforce.

Merit rating, often synonymous with performance appraisal, is a systematic method used by organizations to evaluate the efficiency, quality of work, and overall contribution of an employee. This process involves comparing an individual's actual performance against established standards or job requirements. The results are typically used for administrative decisions such as promotions, salary increments, training needs, and career development planning.

The Halo effect occurs when a supervisor's overall impression of an employee, based on a single positive characteristic, biases their judgment of all other performance dimensions. This leads to an inaccurate appraisal where the employee is rated highly across the board, regardless of their actual performance in other areas.

A 360-degree appraisal is a comprehensive feedback method where an employee receives performance evaluations from all directions: supervisors, peers, subordinates, and even external customers. This multi-source feedback provides a more holistic view of the employee's performance compared to traditional top-down appraisals.

The paired comparison method (a-4) ranks employees by comparing them in pairs. Forced choice (b-2) uses sets of descriptive statements. Critical incidents (c-3) focus on effective versus ineffective behaviors. The field review method (d-1) involves interviewing supervisors and reviewing records to assess performance.

The Halo effect occurs when a rater allows one positive trait or a general favorable impression of an employee to influence their ratings across all other performance categories. This cognitive bias prevents an objective assessment of specific strengths and weaknesses, leading to skewed appraisal results.