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October 1, 2014

Software Engineering in CS at APU. CS 480 Software Engineering II. Sheldon X. Liang Ph. D. October 1, 2014. Azusa, CA. 1. October 1, 2014. Azusa Pacific University, Azusa, CA 91702, Tel: (800) 8 25-5278 Department of Computer Science, http://www.apu.edu/clas/computerscience/.

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October 1, 2014

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  1. Software Engineering in CS at APU CS 480 Software Engineering II Sheldon X. Liang Ph. D. October 1, 2014 Azusa, CA 1 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  2. Software Engineering in CS at APU CS 480 (SE)2 vs. Software Engineering 2 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  3. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What is a system  What is systems engineering  What is systems engineering process  What we learn from systems engineering Break down: Problem Definition (PRD) Model&Interface: Problem Design (SDD) Unit coding: Programming (SPP) Put-together: Integration (SIP)  What we are going to do with DFD  OT is the key to Software Construction 3 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  4. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What is a system     Components - A purposeful collection of inter-related components working together to achieve some common objective. External Entities - A system may include software, mechanical, electrical and electronic hardware and be operated by people. External Dependencies - System components are dependent on other system components Collaboration - The properties and behavior of system components are inextricably intermingled problem requirements definition: identification of data & operation 4 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  5. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What is systems engineering    Systems Engineering (SE) is an interdisciplinary field of engineering, that focuses on the development and organization of complex artificial systems. Systems Engineering integrates other disciplines and specialty groups into a team effort, forming a structured development process that proceeds from concept to production to operation and disposal. Systems Engineering considers both the business and the technical needs of all customers, with the goal of providing a quality product that meets the user needs Structured development process: Analysis vs Synthesis 5 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  6. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What is systems engineering process 6 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  7. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we learn from systems engineering Break down: Problem Definition (PRD) Model&Interface: Problem Design (SDD) Unit coding: Programming (SPP) Put-together: Integration (SIP) 7 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  8. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we learn from systems engineering 8 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  9. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering V  What we learn from systems engineering V 9 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  10. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering V  What we learn from systems engineering From Conceptual to Complete V Software Construction From break-down to put-together 10 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  11. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we learn from systems engineering V Requirement Analysis Functional Analysis/Allocation Integration / Synthesis 11 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  12. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we learn from systems engineering PRD & SDD V Problem Definition (PRD) -- Identify external entities -- identify major components -- identify links (dataflow) Requirement Analysis Functional Analysis Functional Allocation Problem Design (SDD) -- functional allocation -- activities & interface -- identify further components -- identify links 12 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  13. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD V V 13 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  14. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD V 14 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  15. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD SRS: -- External Entities  Customer Keypad  Card Reader  Control System  Customer Display  Printout Dispenser  Cash Dispenser -- Functional Level-0  Auto Teller System 15 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  16. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD SRS (Refined): -- External Entities -- Functional Level-1  Receive operator command  Verify PIN from card  Display customer options  Prepare command  Update display  Prepare message  Prepare printout  Mange withdrawal V 16 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  17. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD SDD (description): The CheckPIN procedure handles the verification of the customer's Personal Identification Number (PIN) using data retrieved from the card's magnetic strip. The procedure invites the customer to enter their PIN using the keypad. If this does not match the PIN stored on the card, a limited number of retries is permitted, after which the card is confiscated as a security precaution. If the correct PIN is entered, the Services procedure is called. V 17 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  18. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD SDD (pseudo-code): PROCEDURE CheckPIN CONSTANTS MAXPINS IS 3 VARIABLES PINCounter IS NUMBER BEGIN read data from card set PINCounter to zero LOOP UNTIL PINCounter is equal to MAXPINS input PIN from customer keypad IF entered PIN matches card PIN THEN EXITLOOP ENDIF add 1 to PINCounter ENDLOOP IF PINCounter is equal to MAXPINS THEN confiscate customer's card ELSE CALL PROCEDURE Services ENDIF END CheckPIN V 18 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  19. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD Problem Requirements Definition (PRD) PRD0 = Major_Operation + ∑ External_entities PRD* = ∑ Functional_allocation (tasks) + ∑ Dataflows Software Design Document (SDD) SDD = ∑ Functional_Description (strategic psuedo-code) Software Project Plan SPP = ∑ Scheduled Implementation (coding & testing plan)    19 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  20. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with DFD Program = DataStructure + Algorithm: /* Data Pool */ … … void Op1 (… …) { } int Fun2 (… …) { } void Op3 (… …) { } float Fun4 (… …) { } int main () { … … } Data Pool Op1 Fun2 Op3 Fun4 20 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  21. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  What we’re going to do with OOA and OOD // Program=DataStructure + Algorithm: Class CLS1 Public void Op1 (… …) { … } int Fun2 (… …) { … } private /* Data Pool */ … … } Class CLS2 public void Op3 (… …) { … } float Fun4 (… …) { … } Private /* Data Pool */ … … } Data Pool Op1 Fun2 Op3 Fun4 21 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  22. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction Object Technology is a widely-used approach to solving the problems of software construction. It involves the encapsulation of functionality and associated data as objects, and the classification of those objects into a hierarchy of classes. This makes it easier to control complexity, and encourages the development of flexible, robust, and re-usable components. 22 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  23. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 23 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  24. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction It takes a big picture approach to programming and design, rather than dwelling on language-specific details, and serves as a framework in the Object Technology theme. Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 24 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  25. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction standard techniques for the specification of software. This is based around a carefully-chosen subset of the UML (Unified Modeling Language), and places the techniques in a formal software engineering context. Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 25 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  26. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction This refers to the concepts and principles of object-oriented programming: 1. objects, methods, interfaces, messages, events, and threads. 2.some knowledge of the notations of the Unified Modeling Language (UML). Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 26 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  27. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction This is about object-oriented programming in the large: 1. distribution of computation across remote servers. 2. software components: independent, self-contained units of software with tightly-specified interfaces, capable of late integration. 3. interoperability between components implemented in different languages and on different platforms. Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 27 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  28. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering  OT is the key to Software Construction This is advanced structure and behavior of object-oriented systems, covering both design and programming. It is based around the notion of a design pattern: an abstraction of a proven solution to a recurring problem in a specific context in system design. The applicability of these ideas is not restricted to object-oriented languages, This needs considerable experience in OOD and OOP programming. Object-Orientation Object-Oriented Design Object-Oriented Programming Distributed Objects Design Patterns 28 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

  29. Software Engineering in CS at APU (SE)2: System Engineering vs Software Engineering Thank you very much! Questions? 29 October 1, 2014 Azusa Pacific University, Azusa, CA 91702,Tel: (800) 825-5278 Department of Computer Science,http://www.apu.edu/clas/computerscience/

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