This department is not buyer specific and work for all the buyers that the company caters to. The major role of department is to getting business for the company. Foundation of all other departments, it assists in converting their ideas into reality.
First interaction of the buyers is with PD department, but in some cases PD is directly done by the merchandising department, there is showroom for meeting as well as presentation for new development/line adaptation to buyer, Samples/mocks developed are just for style and design purpose and measurement do not play major role. If buyer select any of their style then further development will be done by PD department, once order is been booked further follow up and communicating regarding that style will be the responsibility of the concerned merchandiser.