Independent Skilled Class Category is a point based system. You have to achieve a minimum of 67 points for permanent residence. Points are awarded by Age, Education, Languages, profession, Years of Experience, Family in Canada, and adaptableness factors. Applicants are necessary to pass a medical examination, and meet monetary requirements - proving that they can be successfully established in Canada. Candidates will be required to clear background or defense checks.
The Government of Canada publishes a list of specific 38 occupations which have been graded and have determined occupations which are acceptable. With the intention of applying for the independent or skilled worker category, you must be described in one of these occupations. These occupations also have precise educational and experience requirements which are explained in the National Occupations Classification Manual.