Mountain Valley Community Hospital chapter 14

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Mountain Valley Community Hospital chapter 14

• Presented by
• Lou Bearden
• Vanessa Haggans
• Jerry Mack
• Shancona Cranford

2
Introduction

• Chapter 14 follows chapter 3 and 4 using class
  diagrams to show further detail.
• Creating more detailed diagrams will take the
  team at MVCH one step closer to their final goal.

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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?
• Yes! Each of the four groups of people have at
  least one unique attribute. Employees have a
  date hired, volunteers have a skill, physicians
  have specialty and pager number, and patients
  have date of contact and calc-age.

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Project Question 2

• Do there appear to be any link objects in the
  description of tee data requirements in this
  project segment? If so, what are they?
• There are no link objects in this example. A
  person could however say that the Nurse class and
  Care Center class can be represented with a class
  having information showing if the Nurse is in
  charge or not.

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Project Question 3

• Are there any abstract object classes in the
  description of this hospital? Why or Why not?
• Yes, the entity Employee is abstract because it
  does not have direct instances. However the
  descendants technician, nurse, and staff do have
  direct instances.

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Project Question 3
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Project Exercise 1

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

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Class Diagram
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Project Exercise 2

• Develop definitions for each of the following
  types of objects in your class diagram from
  project exercise one. Consult with some member of
  the hospital or healthcare community is one is
  available otherwise make reasonable assumptions
  based on your own knowledge and experience.

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Project Exercise 2

• Classes. A place to store information and actions
  associated with entities in the real world.
• Attributes. Are places to store a piece of
  information.
• Relationships are the connection or dependence
  upon other classes to help define the hospital
  system
• Methods are 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 she or he has a RN certificate as
  a statement of a business rule. How did you
  model this bussiness rule differently from what
  you did in the project case in chapter 4? What
  is the constrained object? Is it an entity, and
  attribute, a relationship, or some other object?

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Project Exercise Answer 3 from chapter 4For a
nurse to be appointed nurse in charge of a care
center, that nurse must possess an RN
certificate.
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Project Exercise 3

• Bussiness rules in class diagrams are represented
  using a box with a folded down corner and plan
  english to describe the rule.
• Here Nurse is the constrained object and is an
  entity.

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Project Exercise 4

• Compare the class diagram 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? What are
  there differences?

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Project Exercise 4 con.

• The object-oriented model in this chapter is
  different from the EER diagram and ER diagrams
  by the object model can be used for data and
  process modeling. The object model also is used
  to develop complex systems such as the one used
  in this MVCH model. The object-oriented model
  also provides better communication and more
  in-depth understanding than the ER and EER
  diagrams. ER and EER diagrams lack a common
  underlying representation and are weakly
  connected.

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ER and EER diagrams
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Class Diagram

• The object-oriented model provides a continuous
  representation from analysis, to design and
  implementation.

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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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Yes Maternity, Emergency, and cardiology, are
parts of the composition Care center.
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Vanessas Question

• What is one of the subclass and superclass
  relationships from the class diagram?

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Vanessas Answer

• Nurse, staff, and Technician are subclasses of
  the superclass Employee.

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Lous Question

• Why is the aggregation of person overlapping,
  incomplete?
• Employee, physician, patient, and volunteer are
  the only entities shown, but there is a small
  number of other people involved in the hospital.
• The overlap rule applies here because someone can
  be a patient while also being listed as an
  employee or volunteer.

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Shanconas Question

• What is the relationship between the MVCH
  laboratory and the building?
• A laboratory is housed in one and only one
  building and a building may house many
  laboratories.

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Jerrys Question

• Name three concrete classes shown in the diagram,
  and why are they concrete?
• Three concrete classes are nurse, staff, and
  technician. They are concrete because they can
  have direct instances.