Organisation development may be necessary even if the organisation operates in a healthy manner, in other words it develops and changes continuously, it adapts to the smaller changes of the environment, yet it finds further development important. Organisation development may also be necessary when the organisation sets about to make radical and complex changes concerning its basis (fundamental aims, method of operation, essential values, technical-intellectual knowhow, critical mass, ownership structure) requiring a new paradigm, and would like to handle such changes. Thus, the following events may constitute the basis for an extensive organisation development process:

• setting up a new organisation
• expanding the organisation
• in case of company acquisition and merger
• harmonising the corporate culture with the strategy
• other internal or external change relating to the economic situation