The proportions metric represents the percentage of calls forecast or received for any given day in a predefined window (typically 30 minutes). In order to calculate the percentage, you need to know the call load: talk time, after call work and volume (or their variations for other contact channels). If you received 1,000 calls for the day, and 60 came in between 10:00 and 10:30, that half hour’s proportion would be 6 percent or .06 (60/1,000). Proportions are used to project patterns into the future, for example, how many calls can be expected on a typical Tuesday from 10:00AM to 10:30AM.