Marketing management employs tools from economics and competitive strategy to analyze the industry context in which the firm operates. These include Porter's five forces, analysis of strategic groups of competitors, value chain analysis, and others. In competitor analysis, marketers build detailed profiles of each competitor in the market, focusing on their relative competitive strengths and weaknesses using SWOT analysis. Marketing managers will examine each competitor's cost structure, sources of profits, resources and competencies, competitive positioning and product differentiation, a degree of vertical integration, historical responses to industry developments, and other factors. Marketing management often conducts market research and marketing research to perform marketing analysis. Marketers employ a variety of techniques to conduct market research, but some of the more common include: Qualitative marketing research, such as focus groups and various types of interviews Quantitative marketing research, such as statistical surveys Experimental techniques such as test markets Observational techniques such as ethnographic (on-site) observation Marketing managers may also design and oversee various environmental scanning and competitive intelligence processes to help identify trends and inform the company's marketing analysis.