Name the department, find out what skills are needed, then link the skills to the business - cost vs.revenue or revenue impact, study profiles from job portals for similar skills, talk to others in the same business and assess the need/importance, check if it can be automated or not and then step back, pat yourself on the back!
From India, Mumbai
Departments are developed or designed for a special activity or function. If you feel that your business needs a department with persons who have special skills and knowledge then go ahead and create the one.
Your 110-character post is too shor or it is like SMS. You have not mentioned the context of your query. There is no introduction to your query and which department you would like to create.
If you check Wikipedia for the article on division of labour, you will find thoughts of 14 thinkers.
To create the department, you first need to define the objectives of the department. Thereafter, you need to identify the Key Performance Indicators (KPIs) of this department. Thereafter, you need to derive Key Result Areas (KRAs) from these KPIs and identify what target you would like to set. Based on the target, you need to identify how much manpower you will require, the quality of the manpower, their education qualifications, the knowledge or skills that they need to have etc.
Thereafter, you need to identify reporting structure within the department to whom HoD of this department will report to.
From India, Bangalore
Steps are not involved in creating a department rather activities of the organisation.
It depends upon quantum of work and numbers of manpower involvement.
It further depends when some special activities started but not being manged properly or under dual responsible with some other department.
It is suggested to consult an Industrial Engineer with your activities details of your organisation and requirements.
From India, Mumbai