There are variety of methods which can help improve the usability of your site.They can be divided in to two categories: one which gather data from the usersand the other which is applied without actual user.
The follwing are the types of methods:
Usability evaluations can be done at many stages during design and development process. it depends upon which method you choose.
GOMS stands for Goals, Operators, Methods and Selection rules.It is an approach to Human Computer Interaction observation developed by card, moran and newell in 1983.
Goals represent the goal that the user is trying to achieve
Operators are the set of automatic-level operations with which user use’s to attain the goal.
Methods represent the sequence of operations grouped together toattain a goal.
Selection rules it is used to decide which method to use when several are applicable for solving a goal.
Variations of GOMS: