Final answer:
Appraisal criteria, methods, and documentation must be designed to be effective, efficient, and reliable, ensuring a trustworthy appraisal process.
Step-by-step explanation:
The appraisal criteria, methods, and documentation must be designed to ensure that they are effective, efficient, and reliable. Being effective means that the appraisal accurately reflects the value of the item or performance being appraised. Efficiency refers to the process being economical, in terms of time and resources, without sacrificing quality. Reliability ensures that the appraisal results are consistent and could be replicated under similar circumstances. Therefore, when these three elements are met, the overall appraisal process is considered robust and trustworthy.