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  2. Health maintenance organization - Wikipedia

    en.wikipedia.org/.../Health_maintenance_organization

    In the network model, an HMO will contract with any combination of groups, IPAs (Independent Practice Associations), and individual physicians. Since 1990, most HMOs run by managed care organizations with other lines of business (such as PPO , POS and indemnity) use the network model.

  3. Preferred provider organization - Wikipedia

    en.wikipedia.org/.../Preferred_provider_organization

    In U.S. health insurance, a preferred provider organization (PPO), sometimes referred to as a participating provider organization or preferred provider option, is a managed care organization of medical doctors, hospitals, and other health care providers who have agreed with an insurer or a third-party administrator to provide health care at ...

  4. Accountable care organization - Wikipedia

    en.wikipedia.org/wiki/Accountable_care_organization

    An accountable care organization (ACO) is a healthcare organization that ties provider reimbursements to quality metrics and reductions in the cost of care. ACOs in the United States are formed from a group of coordinated health-care practitioners.

  5. Pyramid scheme - Wikipedia

    en.wikipedia.org/wiki/Pyramid_scheme

    The unsustainable exponential progression of a classic pyramid scheme in which every member is required to recruit six new people. To sustain the scheme, the 2.2 billion people in the 12th layer would be required to recruit 13.1 billion more people for the 13th layer, even though there are not nearly enough people in the world to achieve that.

  6. Concept of operations - Wikipedia

    en.wikipedia.org/wiki/Concept_of_operations

    Examples include business requirements specification or stakeholder requirements specification (StRS). CONOPS is used to communicate the quantitative and qualitative system characteristics to all stakeholders. [2] CONOPS are widely used in the military, governmental services and other fields.

  7. Non-governmental organization - Wikipedia

    en.wikipedia.org/wiki/Non-governmental_organization

    Operational NGOs often have a hierarchical structure; their headquarters are staffed by professionals who plan projects, create budgets, keep accounts, and report to and communicate with operational fieldworkers on projects. [19] They are most often associated with the delivery of services or environmental issues, emergency relief, and public ...

  8. Crystal structure - Wikipedia

    en.wikipedia.org/wiki/Crystal_structure

    Crystal structure is described in terms of the geometry of arrangement of particles in the unit cells. The unit cell is defined as the smallest repeating unit having the full symmetry of the crystal structure. [2]

  9. Business plan - Wikipedia

    en.wikipedia.org/wiki/Business_plan

    For example, a business plan for a non-profit might discuss the fit between the business plan and the organization's mission. Banks are quite concerned about defaults, so a business plan for a bank loan will build a convincing case for the organization's ability to repay the loan.