Jobs often undergo changes to meet the changing needs of the workplace. If the changes to the job content of a female job class are such that they affect the overall value of the job class in terms of skill, effort responsibility and working conditions, it may be necessary to re-evaluate and /or re-classify the female job class and compare it with another male job class. Depending on the extent and nature of the changes, some, but not necessarily all, changes to jobs have implications for pay equity. Pay equity is maintained, for example, when one or more job classes are added or eliminated and the changes have been evaluated in a way that is free of gender bias.