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Provisioning guidelines 3-3
Step 
 and forecast growth
The first step in provisioning an initial SL-1 is to forecast the growth of the
system at the 2-year and 
 interval in terms of telephone stations.
The number of telephones required when the system is placed in service
(cutover) is determined by the customer. If the customer is unable to
provide a 2-year and 5-year station growth forecast, then a customer
estimate of annual growth of personnel in percent is used to estimate the
number of stations required at the 2-year and 
 interval.
Example
A customer has 500 employees and requires 275 telephones to meet the
system cutover. The customer projects an annual increase of 5% of
employees based on future business expansion. The employee growth
forecast is:
500 employees x 0.05 
 growth) = 25
525 employees x 0.05 = 27 additional employees at 1 year
552 employees x 0.05 = 
 additional employees at 2 years
580 employees x 0.05 = 29 additional employees at 3 years
609 employees x 0.05 = 31 additional employees at 4 years
640 employees x 0.05 = 32 additional employees at 5 years
The ratio of telephones to employees is 
 = 0.55.
System engineering 553-3001-l 51