This sentence is a little confusing. I think it might be reworded to:
After the employees discuss it, the workshop should improve the company.
Although I am not sure if this is the meaning you are trying to impart. Following is a synonym to after.
EDIT: Some comments have suggested another possible meaning.
The purpose of the workshop is to improve the company according to the suggestions of the employees.
In this case, following is a synonym to according to.