I have make sales plan for FMCG for more than 20 years. I have a special methodology called OGSAM.

O - Organization - Structure available and nedded
G - Goal - Strategic Goal aligned with Business Plan
S- Strategies - How the Goals will achieved
A- Actions - Detailling Strategies into Actions
M- Matrix - All numbers involved included simulations of defferent scenarios.

Addtionally Consider> SWOT Analysis
Market Share, and Product Matrix

I am also specialist in Balanced Score Card.

More details it will be a pleasure to answer in a call.