Different industries and jobs need different kinds of appraisal methods. These methods will change based upon the job specifications for each position within the company. In addition to industry$-$specific and job$-$specific methods, many organisations will use these methods in combination, as opposed to just one method.

$($a$)$

Describe the term 'Behaviourally Anchored Rating Scales $($BARS$)\text{'}$ and its usage for human resource development.

$(10)$

$($b$)$ 'Critical Incident' method is another performance appraisal tool that analyses the behaviour of employees. Explain how this method is used and how useful it is for organisations.