Ch5 1 1
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This document discusses data flow diagrams (DFDs) and their use in structured analysis and design. It describes the graphical notation of DFDs including symbols to represent external entities, data flows, processes, data stores, and levels. DFDs can be drawn at multiple levels with the top-most level called the context diagram. The document provides an example of a DFD for a course registration system to illustrate DFD construction and levels.
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Student Name Daniel RosadoCourseCIS339Session (month, ye.docx
Student Name: Daniel Rosado
Course:
CIS339
Session (month, year):
01/2016
Object-Oriented System Analysis and Design
The School of Prosperity
Student Records System (SRS)
Week1—System Request3
Week2—Use Case Diagram AND Use Cases Descriptions5
Week3—Class Diagram AND CRC Cards9
Week4—Sequence, Communication, and State Machine Diagrams15
Week5—Package Diagram19
Week6—Method Contract AND Method Specification21
Week7—Object-Oriented Application Coding24
Week1—System Request
1
Use this system request template and complete the SRS system request.
System Request
The School of Prosperity
Student Records System (SRS)
Project sponsor:
The School of Prosperity (SoP)
Business Need:
New Internet-accessible Student Record System that will allow students the capability to handle their own registration and staff to maintain records, courses, and schedule online-face-to-face classes.
Business Requirements:
1.) Online accessible system
2.) Reduce registration time
3.) Handle enrollment increases
Business Value:
1.) Reduction in time spent registering students by 90% from 1000 to 100 hrs.
2.) Increase in staff productivity by 10% resulting in $50,000/yr. in cost savings
3.) Paper/Printer usage reduction resulting in approximately $3,000 in savings/yr.
4.)Staff morale is expected to increase due to increased time available for their projects
5.) Eliminate paper filing/registration errors
Special Issues or Constraints:
1.) Completion in one year
2.) Security; Students access to school files must be addressed/restricted
3.) Possibly integrate with currently used home grown apps/systems
2
I believe that my system request addresses the SRS Preliminary Planning Overview because it addresses the issue of what the customer wants, the specifics it is requiring along with the time frame it is requesting it in.
Here are my five questions that would help clarify some project issues/concerns:
1. Will the project team be responsible for loading all the archived/previous semesters of data of students?
2. What are the levels of permissions/rights that will be required at each level (i.e. Help Desk, Advisor, Dean, etc.)?
3. Does the one year time frame include deployment and training, or is it just delivery of application/system?
4. Who will provide the architecture/infrastructure for this deployment?
5. Is SoP looking for a licensed/supported application or are they interested in a COTS (Custom off the Shelf) application that they own outright?
3I completed my work by reviewing the Preliminary Planning Overview and identifying, the request, sponsor, business need(s), requirement(s), value and issues/constraints. I made the decision to differentiate between what were needs/ requirements and what were requests. The needs/requirements were where the system was accessed (internet accessible), how/who accessed the data/system (security) and when it needed to be in place (in one year).
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1
SRS Use Case Diagram
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Week1—System Request3
Week2—Use Case Diagram AND Use Cases Descriptions5
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Week4—Sequence, Communication, and State Machine Diagrams15
Week5—Package Diagram19
Week6—Method Contract AND Method Specification21
Week7—Object-Oriented Application Coding24
Week 1—System Request
1
Use this system request template and complete the SRS system request.
System Request—
Project sponsor:
School of Prosperity (SoP)
Business Need:
The existing desktop system will be upgraded to web-based application and this system will be used to maintain records of students, courses, classes, and student registration and grades.
Business Requirements:
The system is capable of having the following functonalities:
· Accessibility over the Internet
· Maintains records of school students
· Maintains records of courses offered by school
· Maintain records of classes offered of the above courses (both online and face-to-face classes)
· Students registration system is included as well
Business Value:
Conservative estimates of tangible value to the company include:
· The SRS will enable the school to continue the expansion of its student population and to effectively manage the expansion
· Eliminate many school staff hours re-entering paper form student registrations by allowing the students to self-register
· Make the system easy to access from anywhere there is an Internet connection and a web browser
Special Issues or Constraints:
· The SRS must be able to handle both online and face-to-face class offerings
· The system must be accessible over the Internet to both school staff and students each with appropriate permissions
· The SRS must try to integrate with and re-use existing desktop application code and database as much as possible to reduce development cost
2
Validate and verify that your system request addresses the SRS Preliminary Planning Overview.
The business need area explains what the SoP is requiring the system to operate. The business requirements consist of what the system must be able to handle and the expectations of the system (once it’s completed). The business value breaks down the details of information that the new system will save on both staff hours and finances for the school. The issues area give problems that could exist once the system is implemented.
3
Explain how you completed your work, the decisions you made to arrive at your conclusions, and the lessons you learned.
I, carefully, read the SRS Preliminary Planning Overview and highlighted the important business needs that the SRS system is to meet. I then started to complete the various sections of the System Request Form and while doing so, I referred back to the SRS overview document to confirm my conclusions and understanding. The result of this iterative process is the current Syste.
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System analysis and design involves analyzing business processes and requirements and designing logical systems models. Key activities include fact finding, modeling current and required systems, and producing requirements specifications and logical models. Data flow diagrams (DFDs) are a common modeling technique, depicting the flow of data through a system via processes, external entities, and data stores. DFDs are drawn at different levels of detail, with level 0 providing an overview and higher levels showing more granular decompositions of processes. Proper notation, numbering, labeling, and balancing are important for effective DFDs.
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DFD.ppt
This document discusses data flow diagrams (DFDs) and their use in structuring system process requirements. It provides an overview of DFDs and describes how they can be used to model processes, decompose diagrams into lower levels, and balance high-level and low-level views. The document also discusses the four types of DFDs (current physical, current logical, new physical, new logical), and guidelines for drawing DFDs, including rules for decomposition, stopping decomposition, and using DFDs for analysis.
Data flow Diagram (DFD)
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Student Name Daniel RosadoCourseCIS339Session (month, ye.docx
Student Name: Daniel Rosado
Course:
CIS339
Session (month, year):
01/2016
Object-Oriented System Analysis and Design
The School of Prosperity
Student Records System (SRS)
Week1—System Request3
Week2—Use Case Diagram AND Use Cases Descriptions5
Week3—Class Diagram AND CRC Cards9
Week4—Sequence, Communication, and State Machine Diagrams15
Week5—Package Diagram19
Week6—Method Contract AND Method Specification21
Week7—Object-Oriented Application Coding24
Week1—System Request
1
Use this system request template and complete the SRS system request.
System Request
The School of Prosperity
Student Records System (SRS)
Project sponsor:
The School of Prosperity (SoP)
Business Need:
New Internet-accessible Student Record System that will allow students the capability to handle their own registration and staff to maintain records, courses, and schedule online-face-to-face classes.
Business Requirements:
1.) Online accessible system
2.) Reduce registration time
3.) Handle enrollment increases
Business Value:
1.) Reduction in time spent registering students by 90% from 1000 to 100 hrs.
2.) Increase in staff productivity by 10% resulting in $50,000/yr. in cost savings
3.) Paper/Printer usage reduction resulting in approximately $3,000 in savings/yr.
4.)Staff morale is expected to increase due to increased time available for their projects
5.) Eliminate paper filing/registration errors
Special Issues or Constraints:
1.) Completion in one year
2.) Security; Students access to school files must be addressed/restricted
3.) Possibly integrate with currently used home grown apps/systems
2
I believe that my system request addresses the SRS Preliminary Planning Overview because it addresses the issue of what the customer wants, the specifics it is requiring along with the time frame it is requesting it in.
Here are my five questions that would help clarify some project issues/concerns:
1. Will the project team be responsible for loading all the archived/previous semesters of data of students?
2. What are the levels of permissions/rights that will be required at each level (i.e. Help Desk, Advisor, Dean, etc.)?
3. Does the one year time frame include deployment and training, or is it just delivery of application/system?
4. Who will provide the architecture/infrastructure for this deployment?
5. Is SoP looking for a licensed/supported application or are they interested in a COTS (Custom off the Shelf) application that they own outright?
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Week2—Use Case Diagram andUse Cases Descriptions
1
SRS Use Case Diagram
.
Design Flow Diagram for Information System
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Student Name CourseCIS339Session (month, year)032019.docx
Student Name:
Course:
CIS339
Session (month, year):
03/2019
Object-Oriented System Analysis and Design
The School of Prosperity
Student Records System (SRS)
Week1—System Request3
Week2—Use Case Diagram AND Use Cases Descriptions5
Week3—Class Diagram AND CRC Cards9
Week4—Sequence, Communication, and State Machine Diagrams15
Week5—Package Diagram19
Week6—Method Contract AND Method Specification21
Week7—Object-Oriented Application Coding24
Week 1—System Request
1
Use this system request template and complete the SRS system request.
System Request—
Project sponsor:
School of Prosperity (SoP)
Business Need:
The existing desktop system will be upgraded to web-based application and this system will be used to maintain records of students, courses, classes, and student registration and grades.
Business Requirements:
The system is capable of having the following functonalities:
· Accessibility over the Internet
· Maintains records of school students
· Maintains records of courses offered by school
· Maintain records of classes offered of the above courses (both online and face-to-face classes)
· Students registration system is included as well
Business Value:
Conservative estimates of tangible value to the company include:
· The SRS will enable the school to continue the expansion of its student population and to effectively manage the expansion
· Eliminate many school staff hours re-entering paper form student registrations by allowing the students to self-register
· Make the system easy to access from anywhere there is an Internet connection and a web browser
Special Issues or Constraints:
· The SRS must be able to handle both online and face-to-face class offerings
· The system must be accessible over the Internet to both school staff and students each with appropriate permissions
· The SRS must try to integrate with and re-use existing desktop application code and database as much as possible to reduce development cost
2
Validate and verify that your system request addresses the SRS Preliminary Planning Overview.
The business need area explains what the SoP is requiring the system to operate. The business requirements consist of what the system must be able to handle and the expectations of the system (once it’s completed). The business value breaks down the details of information that the new system will save on both staff hours and finances for the school. The issues area give problems that could exist once the system is implemented.
3
Explain how you completed your work, the decisions you made to arrive at your conclusions, and the lessons you learned.
I, carefully, read the SRS Preliminary Planning Overview and highlighted the important business needs that the SRS system is to meet. I then started to complete the various sections of the System Request Form and while doing so, I referred back to the SRS overview document to confirm my conclusions and understanding. The result of this iterative process is the current Syste.
Data Flow Diagram
System analysis and design involves analyzing business processes and requirements and designing logical systems models. Key activities include fact finding, modeling current and required systems, and producing requirements specifications and logical models. Data flow diagrams (DFDs) are a common modeling technique, depicting the flow of data through a system via processes, external entities, and data stores. DFDs are drawn at different levels of detail, with level 0 providing an overview and higher levels showing more granular decompositions of processes. Proper notation, numbering, labeling, and balancing are important for effective DFDs.
DFD.pptx
A data flow diagram (DFD) visually represents the flow of data through a process or system. It uses standard symbols like circles or rectangles to represent external entities, processes, data stores, and data flows. DFDs can have multiple levels that break the system down into more detailed subprocesses. Logical DFDs focus on essential business data flows, while Physical DFDs show how the system is or will be implemented technically.
Data Flow Diagram - IT Project Management
Data Flow Diagram - IT Project ManagementWe Learn - A Continuous Learning Forum from Welingkar's Distance Learning Program.
A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system. Get the detailed dataflow diagram tutorial about the symbols with the example.
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DFD.ppt
This document discusses data flow diagrams (DFDs) and their use in structuring system process requirements. It provides an overview of DFDs and describes how they can be used to model processes, decompose diagrams into lower levels, and balance high-level and low-level views. The document also discusses the four types of DFDs (current physical, current logical, new physical, new logical), and guidelines for drawing DFDs, including rules for decomposition, stopping decomposition, and using DFDs for analysis.
Data flow Diagram (DFD)
the ppt contains the overview about the Data Flow Diagram.it will be the simple powerpoint file and it contains a brief view on elements of the Data Flow Diagram,it also contains the level 0 and level 1 diagrams.
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Ch5 1 1
- 3. 3 DFDs: Structured Analysis/Structured Design Structured Analysis/Structured Design (SA/SD): Supported by many CASE tools. Documented in many popular books. Influenced many other design methods.
- 4. 4 DFDs: Objectives Avoiding the cost of:
- 5. 5 DFDs: Graphical Notation Symbols to represent external entitiesi
- 6. 6 DFDs: Graphical Notation Data flow: A path of a particular type of data
- 7. 7 DFDs: Graphical Notation Functions/Processes: Transform an input data flow to an output data flow
- 8. 8 DFDs: Graphical Notation Data store: Data/information store
- 9. 9 DFDs: Levels DFDs can be drawn at multiple levels: Topmost level of DFD is called the Context diagram. Context diagram: Level 1 DFD:
- 10. 10 DFDs: Levels Level 2 DFD: Each process in a Level 2 DFD can be further exploded to form a Level 3 DFD and so on.. Top-down expansion: Usually not advisable to go beyond Level 3 DFD.
- 11. 11 DFDs: Levels When to stop expanding?
- 13. 13 DFDs: Hints for construction
- 14. 14 DFDs: Construction Method ... ... Input1 Input 2 Inputn Output 1 Output 2 Output m information system Start from the context diagram
- 15. 15 DFDs: Construction Method Proceed with refinements until elementary functions are reached. Preserve balance A A1 A3 A2 A4 A5 A6 A7 B1 B2 B3 B4 Ag I O I O H K J M N P Q R S K T K1 K2 K3 K4 M N
- 16. 16 DFD: Course Registration System Consider a course registration system. When a student provides a prioritized list of courses and other information to the system, this information is transformed into a list of preferences. The list of preferences is used to verify the eligibility of the students using the student records and the course prerequisites. If the student is eligible to register for the courses he/she desires, then the student is enrolled in those courses, and the class schedule is communicated back to the student. In addition, the system also compiles the list of students enrolled in each class using the registration information for each student. This list is then given to the faculty. The list is also forwarded to the registrar so that a classroom of an appropriate capacity can be allocated depending on the number of students enrolled.
- 17. 17 DFD: Course Registration System Registration Process Faculty Students Class list Courses & other info. Class schedule Context Diagram for Course Registration System Registrar
- 18. 18 DFD: Course Registration System 1. Enroll Students 2. Compile & Distribute Information Students FacultyStudents Courses & Other info. Individual Course Registration Information Schedules Class Lists Level 1 DFD Note: External entity Students is replicated to avoid crossing lines Registrar
- 19. 19 DFD: Course Registration System Level 2 DFD 1.1 Obtain Student Preferences 1.2 Check Eligibility Student Records Course Prereqs 1.3 Enroll Students in Classes Courses & Other info. List of Preferences Eligible Students Individual course registration information