Definition
An appraisal type where several appraisers appraise one or more persons or objects. Every appraiser creates a separate subappraisal. An overall appraisal is created by consolidating the results of these subappraisals. If an appraisal is an anonymous appraisal, the only information stored on the appraisers is the number of appraisers involved.
Use
Use appraisal models of the appraisal type (anonymous) multisource appraisal to map appraisal systems where the ratings are collected from different subappraisals.
Multisource appraisals are suitable for the following appraisal systems:

A 360° appraisal of a person might involve collecting subappraisals from this person’s supervisor, a colleague and a customer. The person also appraises him or herself. An overall appraisal is calculated on the basis of these 4 subappraisals. This overall appraisal is calculated automatically using the average value of the subappraisal results (the weighting of the supervisor’s subappraisal is double that of the other subappraisals).

The supervisor of a department is appraised by each individual employee in the department. A specially assigned person plans the appraisal in the system, and prints out appraisal sheets. The subappraisals are performed on paper by every employee. The results of these subappraisals and information on the number of appraisers involved are entered into the system by a person authorized to do so. An overall appraisal is calculated from these subappraisals (the average of the subappraisal results is calculated automatically).

The manager of a department wants to improve the appraisal procedure. Consequently, a system is introduced whereby every employee in the department is appraised by two other employees. The manager then looks at the two resulting subappraisals, and creates a subappraisal of her own, which automatically becomes the overall appraisal.
Structure
Multisource appraisals comprise several subappraisals from different sources, and an overall appraisal.
The overall appraisal is determined from the subappraisals using a calculation method defined in the appraisal model. The following calculation methods are available in the standard system:
Every appraiser who creates a subappraisal is given a weighting. This weighting is taken into account when the overall appraisal is being determined. In the standard system, weightings are only taken into account in the Averages calculation method.
For further information, please refer to
Appraisals.