Time and resources:
To accomplish change, the organization and the OD practitioner must commit time and resources to the effort. Each must be clear about how many resources will be dedicated to the change process. Failure to make explicit the necessary requirements of a change process can quickly decay an OD effort. Resources can be divided into two parts: essential requirements and desired requirements. Essential requirements are things that are absolutely necessary if the change process is to be successful. From a practitioner's perspective they can include access to key people or information, enough time to do the job, and commitment from certain stakeholder groups