Sometimes the literature addresses the target company or industry but doesn't answer your specific questions. For the details you need, call the author of the article or report. Most are delighted to talk with an interested inquirer. If your budget won't cover all the expensive industry studies you would like to have, just borrow instead of buy. Trade association libraries buy most of the important studies for their industry.
Most libraries welcome serious researchers.
When you're investigating an industry that is unfamiliar to you, tap trade association librarians for leads to all types of industry-specific sources, such as data bases, consultants, and product directories. They have to know the company's business, and most will share valuable insights. Your competitors may use local universities to assist with product development. If so, the project proposals and progress reports are likely to be available, especially if the school is publicly funded. Universities near your target may have a special interest in the company.