hi
organization development (OD) interventions or ODI are sets of activities in which some organizational units, i.e., individuals or groups or even third parties take up some set of tasks with the aim of organizational improvement and individual development.
so these are any structured activities undertaken in an organization with the main purpose of improvement of its culture and/or climate.
depending upon the focus group i.e, individuals, teams or the organization as a whole a particular intervention is adopted.
Career Planning, Coaching, Sensitivity Training, MBO, Team MBO, TQM, QWL programs, cultural analysis, etc. are all different forms of ODIs.
Further if you want to study it in detail, refer to the book named organization development by wendell l. French, Cecil H. Bell, Jr. and Veena Vohra. Publisher- Pearson Education.