Estimating manpower requirement means estimating the number and types of persons required in the organisation, in case of starting a new business or expanding the existing business.

Staffing is the managerial function of filling and keeping filled positions in the organisation. 

Recruitment is related to searching for prospective candidates. 

Internal sources refer to recruitment from within the organisation, from the existing staff and employees.

Recruitment is a process of searching for prospective employees and stimulating them to apply for jobs in the organisation.

Development is a process of learning and growth. It is career - oriented. It also ensures the overall growth of an employee.

Development is wider in scope than training

External source of recruitment in which newspaper, employment exchange, T.V etc are used.

Coaching is the method of training in which the trainees work directly with a senior manager and the manager takes full responsibility of the trainee.

Face to face conversation between employer and applicant is known as interview.