In manufacturing we do not design or plan again. We just keep replicating the last tested, approved version of the item. For example, a hardware, such as a printer. First it goes through development phase. Engineers will develop and bring all the different parts together to build the printer. Then they will test and upon approval will release the product. Then the manufacturing phase starts. In manufacturing, the product is built in mass number. However, before releasing a product from manufacturing phase, each item will be tested again. This step is required so that no faulty item gets into the market.

To develop software, engineers or developers go through various software development steps in different software development models. Then the finally tested and approved software comes out. Unlike hardware, a software doesn’t have involvement of machineries. One just simply copy & paste the code to replicate it. As the software is virtual, it doesn’t required physical interaction.