Salary is a fixed and regular pay for services rendered e.g. permanent and pensionable workers. While wage is not fixed e.g. casual workers or labourers.
Productivity is the relationship between the output generated by a production or service system and the input provided to create the output. Productivity is the will to improve on the present situation no matter how good it may look.
Productivity measurement in the Public Service is a function of the results and time taken to accomplish them. It is basically the organisation’s final output compared with its input and the impact made by the organisation’s programme.