Job Specification

i am pursuing MBA in HR.
can anybody explain the following:
1. job specification
2. job description
3. job enlargement
4. job environment
5. performance management system

Probably the best way to find an explanation of those 5 areas of Human Resources is to just find someone hiring in the HR area and have a look at the job description that they provide. Many businesses post detailed job descriptions online and that can help you with the breakdown of what will be expected of you when you complete your MBA.

Job specification summarizes the human characteristics needed for satisfactory job completion. It tries to describe the key qualifications someone needs to perform the job successfully.
A job description is a list that a person might use for general tasks, or functions, and responsibilities of a position.(in simpple its jst describing the job which a person possess
Job enlargement means increasing the scope of a job through extending the range of its job duties and responsibilities.
Performance Management is Creating Organizational Alignment and Managing Employee Excellence.