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Overview.The process is designed to handle the interaction with customers and suppliers, and also deals with stock control. Invoice and salary data is recorded.For clarity I have noted down the followingHead Office consists of- product ManagementFinanceSales A topical anaesthetic come apart consists of-A Local OfficeWarehouseDistributionPreliminary List of Entities.In my top-down analysis of the metropolitan Pharmaceuticals scenario, I have starting signal attempted to produce a preliminary list of candidate entities. These are as follows customerclient OrderCustomer InvoiceSales-Occurs plainly once so isnt includedProductProduct OrderSupplierSupplier InvoiceFinance-Occurs only once so isnt includedLocal divideLocal Office-Is part of Local Branch so isnt includedDistribution-Is part of Local Branch so isnt includedWarehouse-Is part of Local Branch so isnt includedStockThe following page shows my list of presumptive entitiesList of Probable Entities.CustomerCustomer OrderCusto mer InvoiceProductProduct OrderSupplierSupplier InvoiceLocal BranchStockDescriptions and expected essential attributes for the above entitiesSince the system analysis is focused on dealing with customers, suppliers and handling products, I have included all entities which I believe participate in these activities.CustomerDescriptionRetail chemist shops or pharmacies associated with shops, hospitals or medical practices. All require a allow for of products from the Metropolitan Pharmaceuticals system.AttributesCustomer ID-Identifying attribute touch onAddressTelephone NumberFax Numbere-mailContact NameDelivery AddressCredit gradeCustomer OrderDescriptionAn order placed by the Customer requesting the delivery of product.AttributesOrder Number-Identifying attributeCustomer IDProduct IDQuantityCustomer InvoiceDescriptionAn invoice sent to the Customer from the Finance department, requesting wages for the delivered goods.AttributesInvoice Number-Identifying attributeOrder IDDateAmount to be payProductDescriptionAn item that is supplied by the Metropolitan Pharmaceuticals system.AttributesProduct ID-Identifying attributeNameDescriptionCategory-(A,B,C or D)Stock Item-(Yes or No)Product OrderDescriptionAn order that is sent to either the Supplier (if it is a non-stock item) or a Local Branch (if it is a stocked item), requesting the delivery of a product to a customer.AttributesOrder Number- Identifying attributeDateProductCustomer IDQuantitySupplierDescriptionA company that is able to supply a range of products to Metropolitan Pharmaceuticals. Metropolitan Pharmaceuticals does not manufacture any of its products, but instead, uses suppliers who either produce or procure the products.AttributesSupplier ID-Identifying attributeNameAddressTelephone NumberFax Numbere-mailSupplier InvoiceDescriptionAn invoice that is sent by the supplier to Metropolitan Pharmaceuticals requesting payment for the product it has provided.AttributesInvoice Number-Identifying attributeDat eAmount to be paidLocal BranchDescriptionA local outlet that contains a Local Office, a Warehouse and a Distribution Center.AttributesBranch ID-Identifying attributeNameAddressTelephone NumberStockDescriptionA in full inventory of products that are held in stock at the local branch.AttributesStock ID-Identifying attributeProduct IDLocation-eg. Shelf numberQuantityRe-Order levelEntity connect or Dependencies.Now to identify which pairs of entities have an association between themselves.Customer is related to Customer OrderJustificationCustomer places Customer OrderCustomer Order is placed by Customer