Final answer:
Deloitte's change in performance appraisal is driven by the recognition that rater's biases and inaccurate observations can skew traditional ratings, hence they've shifted to a future-oriented and ongoing feedback approach.
Step-by-step explanation:
The primary reason behind Deloitte's shift in performance appraisal philosophy is that: a. Ratings might be influenced by a rater's bias or failure to observe employees perform.
Deloitte's innovative approach to performance management stems from the understanding that traditional performance appraisals may not achieve their intended purposes effectively. Research suggests that these evaluations can be subject to unconscious biases and do not always reflect an employee's true contributions (Fletcher, 2001). Deloitte's new strategy prioritizes future-oriented actions which are indicative of an employee's value to the team and the organization as a whole.
Implementing a continual, dialogue-based review process, where employees seek feedback and engage in weekly check-ins with their leaders, supports a proactive development culture. This model is not only tailored to Deloitte's business but aligns with the concepts of industrial and organizational psychology, which aim to make performance evaluations as fair and effective as possible (Fletcher, 2001).