The Ministry of Food Processing Industries in the Indian Government runs a webpage titles Project Profiles that links directly or indirectly to product specific business ideas.
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This links to hundreds of mini business plans which cover details of the process, equipment, manpower, utilities, costs etc. Some of the indirect links from the page give more detailed information on projects eg Enterepreneurship Development Institute of India, Ahmedabad, so its worth surfing around a bit.
These profiles are not directly applicable because they are developed for India, include Indian costs and tend not to be dated. However, they do give good ideas and show clearly the type of information that has to be collected just to think about a product Idea.
Remember India is very successful in the small business sector!