Filtering the idea or elimination of concepts that do not fit or should we ask ourselves three questions: i, Is the target market will benefit from the product? i, What is technically feasible to manufacture this product? i, What will generate benefits the product? a 3 Development and testing of the concept or develop marketing and engineering detail i, What is the target market i, what benefits the product provides i, how will consumers react to the product i, how to produce the product i, what cost will produce proof of concept or asking a sample of potential consumers what they think of the idea a 4 Business Analysis or roughly estimate the selling price or sales volume estimate or estimate the benefits a 5 Test Market and Beta test or produce a physical prototype or test the product in typical situations of use or make adjustments where necessary or to produce an initial circulation of the product and sell it in a test market to determine consumer acceptance a 6 technical production or initiation of new program or estimate of the necessary resources, drafting or planning requirements engineering operations or distribution of tasks by department or assistance needed from suppliers or publication of the resource plan or monitoring program review and planning for possible contingencies or a July or product launch marketing or advertising budget and design the same, distribution of advertisements and other promotional or distribution plan design for the product or critical path analysis is useful at this level we add Wikipedia, that these steps should be repeated as often as needed. Some steps can be eliminated. To reduce the processing time many companies make several at once (what is called concurrent engineering). To facilitate the successful introduction of products in the market and eliminate any weaknesses, recent trends imply interdepartmental meetings in which all those responsible for key areas of the company will participate in creating the product: purchasing, production, logistics, marketing, sales, customer service, etc. In so doing, is to avoid inefficiencies in the product by small errors can make it fail approach. For example, the packaging is too large to optimize the load, that there are problems of supply of various components that can not be guaranteed a convenient repair time. Rob Hannah: the source for more info.