..............are something, which are acceptable or desirable.

Techniques are procedures or methods, which involve a series of steps to be taken to accomplish desired goals.
Principles are guidelines to take decisions or actions while practicing techniques. Principles are basic truths or guidelines for behaviour. 
Values are something, which are acceptable or desirable. They have moral connotations. Values are general rules for behaviour of individuals in society formed through common practice.

While practicing principles of management values cannot be neglected, as businesses have to fulfil social and ethical responsibilities towards society.