Marketing plan is implemented trough marketing organisaion.An organisation may have a centralised marketing department at its corporate head-quarters or may have decentralised marketing depatments at different regions.Marketing departmental head may have a designation of Marketing Manager or Marketing Vice President.Several functionaries may report to him – a sales manager, a promotion manager, a marketing research manager, a distribution manager, a product manger etc.There is the delegation of authority from the top to the bottom.Reporting is from the bottom to the top.To the sales manager, the product manager and promotion manager are staff or advisory functionaries.Marketing research too is an advisory function.Sales is organised on the basis of geography.There is a nation level Sales Manager. To him reports the regional or zonal level sales managers.To these report the Sales Supervisors who directly supervise a team of salesmen.A company with diverse products may have sales managers devoted to these  different products.Product managers are responsible for developing strategies for their product groups.At times, they are also called brand mangers.The system was started by P&G in the US to market Camay soaps first.