A study on the different bettweb IT and DT responsibility

Study the diffrent bettwen information technology department and digital transformation departmnet. In purpuse responsibility and the need. Meaning for and industry company with direct employee size bettwen 1000 to 2000. And total employee sizing with contracties is up to 4,000. Is the seperation needed or the structure of new department that is seprate is a need. What is the oveelaping or diffences. We want to kind of argue agenst with refrances. And if its a must how to they complment ech other. Example from global companies in oil and gas.