Wizard Digitek Enterprises imports various computer parts from China and assembles them to make a complete computer. The total work involves three different tasks : assembling labelling and packing of computer. Each employee of the company independently performs these tasks. As a result, no employee is to gain specialisation in a particular field and the company is unable to fulfil the orders on time. Identify the principle of management which can be followed by Wizard Digitek Enterprises to overcome this problem.