Create a complete ERD in Crow’s Foot notation that can be implemented in the relationalmodel using the following description of
operations. Hot Water (HW) is a small start-upcompany that sells spas. HW does not carry any stock. A few spas are set up in a simplewarehouse so customers can see some of the models available, but any products sold mustbe ordered at the time of the sale
•HW can get spas from several different manufacturers.
•Each manufacturer produces one or more different brands of spas.
•Each and every brand is produced by only one manufacturer.
•Every brand has one or more models.
•Every model is produced as part of a brand. For example, Iguana Bay Spas is amanufacturer that produces Big Blue Iguana spas, a premium-level brand, and LazyLizard spas, an entry-level brand. The Big Blue Iguana brand offers several models,including the BBI-6, an 81-jet spa with two 6-hp motors, and the BBI-10, a 102-jet spawith three 6-hp motors.
•Every manufacturer is identified by a manufacturer code. The company name,address, area code, phone number, and account number are kept in the system forevery manufacturer
•For each brand, the brand name and brand level (premium, mid-level, or entry-level)are kept in the system
•For each model, the model number, number of jets, number of motors, number ofhorsepower per motor, suggested retail price, HW retail price, dry weight, watercapacity, and seating capacity must be kept in the system.
•HW can get spas from several different manufacturers.
•Each manufacturer produces one or more different brands of spas.
•Each and every brand is produced by only one manufacturer.
•Every brand has one or more models.
•Every model is produced as part of a brand. For example, Iguana Bay Spas is amanufacturer that produces Big Blue Iguana spas, a premium-level brand, and LazyLizard spas, an entry-level brand. The Big Blue Iguana brand offers several models,including the BBI-6, an 81-jet spa with two 6-hp motors, and the BBI-10, a 102-jet spawith three 6-hp motors.
•Every manufacturer is identified by a manufacturer code. The company name,address, area code, phone number, and account number are kept in the system forevery manufacturer
•For each brand, the brand name and brand level (premium, mid-level, or entry-level)are kept in the system
•For each model, the model number, number of jets, number of motors, number ofhorsepower per motor, suggested retail price, HW retail price, dry weight, watercapacity, and seating capacity must be kept in the system.
1 answer:
Answer:
Hi Justin! Please find the answer attached and the explanation below.
Explanation:
The Entity Relationship Diagram (ERD) shows the relations between different entities or classes that must interact for the Software application to work. The Crow's Foot notation is the line with 3 ends like a fork or a Crow's foot which denotes a one-to-many relationship between the entities. For example, in this question a manufacturer produces many brands, therefore has a one-to-many relationship with the Brand entity.
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