CMIS 470
Structured Systems Design
Object-Oriented Analysis
and Design –
Sequence Diagrams;
BPP details
Week 5
Plan for Class
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Sequence diagrams
Turn in OO homeworks #1 and #2 (UseCase and Class diagrams)
BPP details
Sequence Diagrams
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Illustrates the objects that participate in
a use-case and the messages that pass
between them over time for one usecase.
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A dynamic model
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Most similar to a DFD Level 0
Patient Admission System
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A patient will call in to schedule an appointment or cancel an
appointment. The office employee should be able to look up the
patient’s name to determine if this is an existing patient. The office
employee should also be able to lookup any existing unpaid bills the
patient may have with the doctor’s office. The system will look up
available times and dates for an appointment. When a day/time works
for the patient, the system will add a new appointment.
Before available days and times can be recorded, an employee of the
doctor’s office will need to create a master schedule. This master
schedule will list all the doctor’s schedules and the days and times the
office will be open for appointments.
A doctor can alter his or her schedule. When this occurs, the doctor
will inform the employee of any days/times when he/she is not
available. In addition, the doctor can add days/times when he/she is
available to see patients.
Elements of a Sequence
Diagram
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Text
Objects
Message or interaction
Message condition
Dotted Line
Focus of Control or Activation
Object creates Object
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If object creates an object, message is
sent directly to an object instead of its
lifeline.
Creating a Sequence Diagram
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1. Copy text for use case from the use
case specification. Paste it onto the left
margin of the page.
2. Identify Objects
3. Add messages
4. Place lifeline and focus of control
Another example
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Enrolling in a fitness class
Catapult special order system
Enrolling in a Fitness Class
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When a student wants to add a new class, the manager will
check the fitness class schedule for availability. The manager
will notify the student of an opening, and the student will pay
the fee if there is an opening. The student is then registered for
the class.
As new instructors are hired, their availability to teach a class
will be recorded. Information on the type of class the instructor
is certified to teach as well as the times he/she is available is
recorded.
At times, the fitness class schedule must be changed. When
this occurs, the manager will change the fitness schedule, and
will then notify the instructors and students who are affected by
the change.
CD special order
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Using the web, customers should be able to search
for products and identify if the item is available.
They should be able to order the item. The
functionality that the system should have is listed
below:
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Search through the inventory of products
Receive marketing material on all products
User should be able to place item into shopping cart
User should be able to provide customer information
including billing information.
Order is accepted.
TIPS
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Don’t turn your sequence diagram into
a flowchart
Update existing models
Modification of Class Diagram
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Similar to DFDs and ERDs, after
creating a Sequence Diagram, you may
alter your Class Diagram.
For Next Class Meeting…
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Review of PDD and WBS
Next RR Deliverable
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Baseline Project Plan is due in three
weeks.
Project Management:
The Big Picture
TRACKING AND REPORTING
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Set the baseline plan
Enter actuals
Track variance
Adjust plan
Print and submit reports
Communicate
RR Project:
Next Deliverable (BPP)
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Baseline Project Plan deliverable:
1.Enter your project plan (WBS) into MS Project
2.Review the plan and fine-tune it (paying attention
to logic of task completion dates)
3.Define resources and assign them to the project
tasks
4.Save as baseline plan
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Must save as BASELINE before starting to record actuals
5.Produce reports requested for the BPP deliverable
RR Project:
TRACK and REPORT
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First status report due October 13
Suggest you hold a team meeting once a week to:
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Record actuals
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Prepare status report for class
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At least START DATE (and FINISH DATE when task is
completed)
Close out completed tasks by setting Percent Complete to
100%
See RR Project specs for what the weekly status report needs
to contain
Make sure each team member is clear on what needs to be done
during the next week
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Consider generating MS-P “To Do List” reports