global supply chain management

Imagine that you are starting a business. What type of forecasting model would you use to decide how many products you will be selling? Would you use the same forecasting model after you have been in business five years? Why or why not? 

Important Note: 

Please note that this is NOT A SHORT-ANSWER QUESTION.  The answer must be detailed, a MINIMUM of ONE SINGLE-SPACED FULL PAGE write-up is required. 

I need this assignment in 20 hours