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  2. Economic order quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_order_quantity

    Economic order quantity. Economic order quantity ( EOQ ), also known as financial purchase quantity or economic buying quantity, [citation needed] is the order quantity that minimizes the total holding costs and ordering costs in inventory management. It is one of the oldest classical production scheduling models.

  3. Material requirements planning - Wikipedia

    en.wikipedia.org/wiki/Material_requirements_planning

    Material requirements planning. Material requirements planning ( MRP) is a production planning, scheduling, and inventory control system used to manage manufacturing processes. Most MRP systems are software -based, but it is possible to conduct MRP by hand as well. An MRP system is intended to simultaneously meet three objectives:

  4. Rainwater harvesting - Wikipedia

    en.wikipedia.org/wiki/Rainwater_harvesting

    Rainwater harvesting. Basic configuration of domestic rainwater harvesting system in Uganda. [ 1] Rainwater harvesting ( RWH) is the collection and storage of rain, rather than allowing it to run off. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit ( well, shaft, or borehole ), aquifer, or a reservoir ...

  5. Aquifer - Wikipedia

    en.wikipedia.org/wiki/Aquifer

    The normal capillary rise in a clayey soil is less than 1.8 m (6 ft) but can range between 0.3 and 10 m (1 and 33 ft). [8] The capillary rise of water in a small-diameter tube involves the same physical process. The water table is the level to which water will rise in a large-diameter pipe (e.g., a well) that goes down into the aquifer and is ...

  6. Social network analysis - Wikipedia

    en.wikipedia.org/wiki/Social_network_analysis

    Social network analysis ( SNA) is the process of investigating social structures through the use of networks and graph theory. [ 1] It characterizes networked structures in terms of nodes (individual actors, people, or things within the network) and the ties, edges, or links (relationships or interactions) that connect them.

  7. Economic production quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_production_quantity

    The economic production quantity model (also known as the EPQ model) determines the quantity a company or retailer should order to minimize the total inventory costs by balancing the inventory holding cost and average fixed ordering cost. The EPQ model was developed and published by E. W. Taft, a statistical engineer working at Winchester ...

  8. Dynamic lot-size model - Wikipedia

    en.wikipedia.org/wiki/Dynamic_lot-size_model

    Dynamic lot-size model. The dynamic lot-size model in inventory theory, is a generalization of the economic order quantity model that takes into account that demand for the product varies over time. The model was introduced by Harvey M. Wagner and Thomson M. Whitin in 1958. [ 1][ 2]

  9. Marginal rate of substitution - Wikipedia

    en.wikipedia.org/wiki/Marginal_rate_of_substitution

    Marginal rate of substitution. In economics, the marginal rate of substitution ( MRS) is the rate at which a consumer can give up some amount of one good in exchange for another good while maintaining the same level of utility. At equilibrium consumption levels (assuming no externalities), marginal rates of substitution are identical.