When do sales people fail to achieve targets?

lack of product knowledge  ==== lack of selling skills ==== target bifercation==== customers wrong selection ==== no follow ups === enthusiam ==== lack of team work ==== bad management

There are number of reasons aside from points mentioned in the question. And those reasons may have nothing to do with the salesperson’s skills, knowledge, motivation, etc. It may be the customer who is not willing for the purchasing decisions at that point in time or it takes time to finally get a sourcing decision in a complicated corporate structure. There may be several other reasons.

However, I believe sales people should be persistent enough and realize that a sale rarely happen on the first meeting. They need to be unrelenting to be finally able to get a sale.  

Poor Knowledge on the product and services and no drive to reach the target. As the saying goes, 'If there's a will, there's a way.

Simple, lack of clients info.  You have to know clients need before proposed anything.  If you give products that customer dont want, so you will not archieve your target.  You have to know well your customer, so it will help your sales closed.  Do study about customer, ( needs, requirement and future change).   So try related all this factor with your products.

I'd rather to put the list in below order,

1. Lack of enthusiasm

2. Bad management (Unqualified Manager)

3. Poor knowledge in products/services

1. Incorrect Prospecting
2. Lack of attention to the details, towards customer requirements
3. Lack of competitors product knowledge
4. Lack of self initiation and service
5. Poor handling of customer inquiry

Lack of knowledge and motivation . 

1 - There is no planning 

2 - does not stimulate 

3 - There is no leader 

4 - does not have control and direction 

5 - targets abnormal 

6 - There is no training 

7 - does not know

Selling is a process and I do not think any true sale man fails. Its all about learning and adopting and never giving up. 

i believe when they lack a clear direction,objectives,knowledge,poor management support and confrontation internally within the sales department.

Bad Management