Compounding Monthly Growth

Previous Contributor

Compounding Monthly Growth

Relatively new user and am struggling to build a ramping growth model based on monthly expansion.  Am using the lag function in this context:   Avg Deal Size = LAG(Avg Deal Size, -1, AEC Salesperson Assumptions.Starting Deal Size) * (1 + Deal Size Growth)   My Deal Size Growth is positive and my overall Avg Deal Size is shrinking which isn't intuitive.  Any help here would be very much appreciated.

Occasional Contributor

Have you tried the PREVIOUS function instead? I am assuming the timescale on the module is 'Month'. 
Avg Deal Size = PREVIOUS(Avg Deal Size) * (1 + Deal Size Growth)

Certified Master Anaplanner

Hi, I noticed you have a "-1" in your lag function--the LAG function is n periods in the PAST therefore -1 = +1 month ahead.  Double negative.


Hi Ravi, with PREVIOUS you lose overflow, which it why LAG is desirable in this scenario.