The OD interventions can be in any and all areas/functions or departments of an organization where things are required to be overhauled. For example, HR OD interventions will include performance appraisals, performance management systems, forms, etc., competency mapping in specific functionary departments or across departments like engineering, IT, Finance, etc., training needs assessment, process improvement study, etc.
The above are some OD interventions that the respective companies undergo with the help of expert consultants. I hope this helps you.
Regards,
S.P. Tripathi NPC India