How you can monitor the sales Territories? when sales are not upto requirement?

GOOD ONE MR.HAROON ,,,,  GO INTO MICRO DETAILS OF THE TERRITORY ,,, CUSTOMERS LIST & TARGETS ........... EXPECTED SALES VS ACHIEVED SALES ,,,,,  DISCUSS & MONITOR THE EACH CUSTOMER , PRODUCT WISE ............ LOGICAL REASONS WILL BE ,,,  LACK OF FOCUS WORKING ,,, LOW RATE OF FOLLOW UPS ,,,, WRONG SELECTION OF THE CUSTOMERS ,,,,  PRODUCT PRICE ,,,  COMPETITORS STRONG WORKING ,,,, LOW SKILLS OF THE SALES FORCE ....... ETC    ETC   

Comprehensive answer already given by Mr. Zafar !!

Have regular sales meetings with your team, where they should give feedback from their territories. Let the report their experience in their territories, market developments, obstacles, ...

I'm learning from the experts, such a beautiful answers. Thanks.