Environmental scanning involves analyzing political, economic, social, technological, legal, and environmental factors that could impact a business. There are three modes of scanning: systematic scanning of factors directly impacting an organization, ad-hoc scanning through occasional surveys, and processed-form scanning using outside information sources. A PESTEL analysis categorizes these factors into political, economic, social, technological, environmental, and legal elements to evaluate external influences. Similarly, a SWOT analysis assesses internal strengths and weaknesses as well as external opportunities and threats.