Some common reasons include: 1  a serious accident â such as a road accident, a severe head injury, a serious fall or severe burns. 2  a serious short-term condition â such as a heart attack or a stroke. 3  a serious infection â such as sepsis (blood poisoning) or severe pneumonia.
The definition of unnecessary is not needed. An example of something unnecessary is a bowl of sugar for cooking meatballs.
Irrelevant Costs. Irrelevant Costs. In managerial accounting, costs over which executives have no control and therefore which cannot be cut to reduce expenses. Examples of irrelevant costs include rent and insurance. Some costs may be irrelevant under some circumstances but relevant under others.