How is the percentage basis calculated in each sales volume planning-specific category list?

If the target %tage needed to be calculated for service sales, so it should be function based on number of technations and labor muliplied by their expected productivity "whihc should be forcasted based on last year average or global target ion case of new business", and finally the company flat rate.

The forecast must be based on previous years acheivemnet with teh gross expectation in case of product sales. 

• How many new customers do we gain each year?
• How many customers do we lose each year?
• What is the average level of sales we make to each customer?
• Are there particular months where we acquire or lose more customers than usual?

It depends on multiple variables like the number of workers in all the sectors which is an independant variable with their peoductivity i.e. the dependant variable. It is very important to mantain the balance of both variables in order to calculate and forcast the expected productivity. 

IT SHOUD BE CALCULATE PRODUCTIVITY, EXPANSION ,SALARY  AND SALES

its depend mainly on the distrbution channels , potential , compititors share

We have another system in my country it's different.

It will always based on the target vs the actuals

This can also be done in reverse to find out the number of basis points that a percent represents by dividing the percent (in decimal form) by 0.0001. For example, say the rate on a bond has risen 2.42%, simply take 0.0242 (2.42% / 100) and divide by 0.0001 to get 242 basis points

yes, it depends on market, production and customers but you always have backgound from similar organization

This % is one of the most accurate methods through which we can easily identify a particular segment about their flow of sales how much increased or decreased and what’s the reason behind.

Sales percentage refers to the percentage of sales of a certain item contributing to an organization's total sales. It is calculated by dividing the total sales of an item by the total revenue to get the percentage of the sale.