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Projects are not islands. They are components of larger entities that work to create a unique product or service. The larger entities, organizations, companies, or communities will have direct influence over the project itself. Consider the values, maturity, business model, culture, and traditions at work in any organization. All of these variables can influence the progress and outcome of the project.
Project managers must also consider the legal requirements and influences over their projects. In the United States, this includes laws and regulations such as Sarbanes-Oxley, Health Insurance Portability and Accountability Act (HIPAA), Occupational Safety and Health Act (OSHA), and others. Projects can also be influenced by communities, other companies (when joint ventures exist), and professional associations. As a rule, the larger the project scope, the more influencers the project manager can expect.