Mountain View Community Hospital Group 5

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Mountain View Community HospitalGroup 5

• Presented By
• Len Gray
• Tristan Erford
• Jan Willems

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Who MVCH depends on

• Employees
• Patients
• Physicians
• Volunteers

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Common Attributes

• All persons (entities) share these common
  attributes
• personID (identifier)
• name
• address
• city-state-zip
• dateOfBirth
• phone

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Unique Attributes

• Employees - - - - - - dateHired
• Patient - - - - - - - - - dateOfContact
• calc-age
• Physicians - - - - - - specialty
• pagerNumber
• Volunteers - - - - - - skill

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Unique Methods

• Each of the four persons (entities) have at least
  one unique method.
• Employee - calc-benefits
• Volunteers - assign-to-Center(CareCenter)
• Physicians - treats(Patient)
• Patients - calc-age and assignToLocation(Bed)

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Physician-to-Patient Relationships

• Each Patient has one and only one Physician who
  is responsible for the Patient.
• A Physician may not be responsible for a Patient
  at a given time or may be responsible for one or
  more Patients.
• Patients are divided into two groups
• - Resident - assignToBed(Bed)
• - dateOfAdmission
• - Outpatient - scheduled for zero or more visits

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Visit Entity

• Attributes
• - date (partial identifier)
• - comments
• An instance of Visit cant exist without an
  outpatient owner entity.

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Three Subdivided Groups of Employee

• Name
• - Attribute - certificate (indicates
  qualification)
• - Relationship - assigned to one and only one
  Care Center
• Staff
• - Attribute - jobClass
• Technician
• - Attribute - skill
• - Relationship - assigned to one or more
  laboratories

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Care Center Entity

• Attributes
• - name (identifier)
• - location
• Examples of Care Centers
• - Maternity
• - Cardiology
• - Emergency

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Care Center Relationships

• Relationships
• - A Care Center may have one or more nurses
  assigned
• to it.
• - One of the nurses assigned to a Care Center is
  
• appointed nurseInCharge.
• - The nurseInCharge must have an RN certificate.
• - A Care Center is assigned zero or more Beds.
• - Care centers are located in Buildings.

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Bed Entity

• Attribute - bedID (composite identifier)
• Components - bedNumber
• - roomNumber
• Method - utilization
• Relationship to Patients
• - Each resident Patient must be assigned a Bed.
• - A Bed may or may not have a resident Patient
  assigned
• to it at a given time.

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Building Entity

• Attributes
• - buildingNumber
• - buildingName
• - buildingCode

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Laboratory Entity

• Attributes
• - name (identifier)
• - location
• Method - numberOfEmployees
• Relationships
• - Each Technician is assigned to one or more
  Laboratories.
• - A Laboratory must have at least one Technician
  assigned to it and
• may have any number of Technicians assigned.
• - A Laboratory is housed in only one Building,
  and a Building may
• house many Laboratories.
• - A Laboratory includes equipment and the
  employees who work in
• that Laboratory.

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Project Question 1

• Is the ability to model superclass/subclass
  relationships likely to be important in a
  hospital environment such as Mountain View
  Community Hospital? Why or why not?

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Project Question 1 Answer

• The ability to model superclass/subclass
  relationships is very important because many of
  the classes share common attributes and behavior.
• Generalizing much of the common attributes and
  behavior makes the process of understanding and
  simplifying a system easier.
• Thus, the result is an improved system design, if
  necessary, and extensions to the system in the
  future.

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Project Question 2

• Do there appear to be any link objects in
• the description of the data requirements in this
  project segment?
• If so, what are they?

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Project Answer 2

• There Do not appear to be any link objects in the
  data requirements.
• However, It could be argued that the association
  between the Nurse class and Care center class
  could be represented with a class that would
  contain information as to whether or not the
  nurse is in charge.

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Project Question 3

• Are there any abstract object classes in the
  description of this hospital?
• Why or Why not?

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Project Answer 3

• The Employee class and Care center class both are
  complete and serve as an abstract class for
  generalizing much of the information needed by
  their subclasses.

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Project Exercise 1 question

• Draw a class diagram to accurately represent this
  set of requirements carefully following the
  notation from this chapter

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(No Transcript)
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Project Exercise 2 question

• Develop definitions for each of the following
  types of objects in your class diagram from
  Project Exercise 1.
• Make reasonable assumptions based on your won
  knowledge and experience.

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Project Exercise 2 answer

• Classes
• A place to store information and actions with
  entities in the real world.
• Attributes
• A place to store a piece of information.
• Relationships
• The connection or dependence upon other classes
  to help define the hospital system.
• Methods
• The actions and procedures the classes perform.

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Project Exercise 3

• You should recognize the statement A nurse
  cannot be appointed nurse_in_charge of a care
  center unless he or she has an RN certificate as
  a business rule. How did you model this business
  rule differently from what you did in Chapter 4?
  What is the constraint object? Is it an entity,
  an attribute, a relationship, or some other
  object?

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Project Exercise 3 Answer

• The rule can be stated as follows For a nurse
  to be appointed nurse-in-charge of a care center,
  that nurse must possess a RN certificate.

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Project Exercise 3 Answer Continued

• This relationship was modeled differently for we
  created constraint that made it state that a
  nurse must possess a certificate to be allowed to
  be a nurse-in-charge.
• In this diagram the Anchor object is the the
  nurse entity, and the corresponding object is the
  RN Certificate which is also an entity, the
  constraint object is considered and attribute in
  the problem.

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Project Exercise 4

• Compare the class diagram you developed in this
  chapter with the EER diagram that you developed
  in Chapter 4 and with the E-R diagram you
  developed in Chapter 3 in Project Exercise 2.
  What are the differences between these two
  diagrams? Why are there differences?

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Project Exercise 4 Answer

• The EER shows the entity types, instances, and
  relationships.
• The ER diagram shows entities as a class object
  which shows behavior as well as attributes which
  is different than entities.
• The Class diagram is easier to read for the
  information is more compact.

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Project Exercise 5

• Did you find any examples of aggregation or
  composition in the description of the project in
  this chapter? Why or why not?

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Project Exercise Answer 5

• We were capable of finding both aggregation and
  composition in the description of this project.
• Aggregation is involved in the project since some
  classes of persons are not enumerated. For
  example There are other persons in the hospital
  community who do not belong to one of these four
  groups.

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Project Exercise 5 Answer Continued

• Composition is demonstrated because there are no
  other types of patients or employees other than
  those listed.
• For example Patients are divided into two
  groups residents and outpatients.
• Employees are divided into three groups nurse,
  staff and technician.

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Lens Question

• In the MVCH case study for this chapter, the
  entity Employee is subdivided into three groups.
  What are the three groups, what attributes do
  they share, what are their unique attributes, and
  can an Employee be a member of more than one group

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Jans Question

• As we can see in Project Exercise 1.
• we have 2 different kinds of semantic
  constraints.
• Explain them?

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Tristans Question

• What are the definitions of aggregation and
  composition, and give an example of each use in
  the MVCH case study?