Both of these concepts are important while implementing process in any organization. Any new process implemented has to go through these two phases.
Implementation: - It is just performing task within a process area (for definition of process area look in to the same chapter). Task is performed according to a process but actions performed to complete the process are not ingrained in the organization. That means the process involved is according to individual point of view. When an organization starts to implement any process it first starts at this phase i.e. Implementation and then when this process sounds good it is raised to the organization level so that it can be implemented across organizations.
Institutionalization: - Institutionalization is the output of implementing the process again and again. The difference between implementation and institutionalization is in the implementation the person who implemented the process goes the process is not followed, but if the process is institutionalized then even if the person leaves the organization, the process is still followed.
Figure: - Implementation and Institutionalization