Unit 06 Assignment - Software Design Development 13.14 5e4v4e
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9o Credit Diploma in IT Unit 6
Software Design Development
Assignment S/W Design and Development
Date Set :
Review Date :
Date Due :
16th September 2013
22nd April 2014
23rd May 2014
and
SOFTWARE DESIGN AND DEVELOPMENT
Learning outcomes to be partially or fully covered 1
Know the features of programming languages
2
Understand the principles of software design
3
Be able to use tools to demonstrate software designs.
Grading criteria To achieve the criteria 6.P.1 Describe the application and limits of procedural, object oriented and event driven programming paradigms. 6.P.2 Describe the factors influencing the choice of programming language. 6.P.3 Explain sequence, selection and iteration as used in computer programming. 6.P.4 Outline the benefits of having a variety of data types available to the programmer. 6.P.5 Explain the role of software design principles and software structures in the IT Systems Development Life Cycle. 6.P.6 Use appropriate tools to design a solution to a defined requirement.
To achieve the Merit criteria 6.M.1 Explain the importance of the quality of code. 6.M.2 Justify the choice of data types and software structures used in a design solution.
To achieve the Distinction criteria 6.D.1 Discuss the factors that can improve the readability of code. 6.D.2 Develop algorithms to represent a design solution.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 2 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Scenario for Part 1 You are working as a senior programmer in a LeSoCo software developing company. Some of the lower level employees would like to be programmers but don’t know where to start. Your manager asked you to create a set of presentations and documents which will introduce these employees to the concepts they need before they start programming properly.
Tasks for Part 1 Task 1.1 – P1 Prepare a presentation on Procedural, Object-Oriented and Event Driven programming approaches (paradigms). In each approach you should explain: Use of the approach Example of different computer language/s including coding. Disadvantages what sort of applications the approach would not be normally used for
Task 1.2 – P2 You need to explain to your audience why you will be using Visual Basic 2010 when some have heard that C++ programs run much faster and that Java programs can run on any computer. In your comparison on Visual Basic 2010, C++ and Java, you should take into the following factors: 1) Organisational policy 2) Suitability in of available features and tools 3) Availability of trained staff 4) Reliability 5) Development and maintenance costs 6) Expandability
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 3 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Task 1.3 – P4 Write a document with following three sections: 1) Using the following table explain at least six VB.Net data types available to the programmers. Data type
Description
Space Occupied
Range
Example
2) Why the choice of data type for a variable is important and what problems can arise if an unsuitable data type is used?
Task 1.4 – P3 Sequence, Selection and Iteration are three basic structures which can be used to build a program. Create a document with following seven sections. In each section, you need to explain the purpose of the structure, a short working VB.NET program with explanation on how the program will work, VB.NET interfaces and pseudocode for each program. (In the program, use comments, proper indenting and the correct naming of variables) 1. Sequence 2. Iteration (Loops) Pre-check (Do While … Loop) Post-check (Do… Loop Until) Counted loops 3. Selection (Condition) IF IF … ELSE Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 4 of 10
SOFTWARE DESIGN AND DEVELOPMENT
CASE Task 1.5 – P5 You are concerned that they understand that sitting down and writing code is not a good option, so you want them to know about Software Design Principles and Software structures. Create a presentation on following: The development life cycle and its stages Software Structures – Functions, Parameter, Procedures, classes, objects and Readability
Task 1.6 – M1 Amateur programmers use a range of short cuts which work fine for small programs. However, professional programmers need to write robust, extensible and understandable code. Create a document with examples which explains why each of the following attributes is important of the quality of code: 1) Robust 2) Usability 3) Portability 4) Maintainability
Task 1.7 – D1 Write a detailed discussion on how to ensure that code is readable for other programmers. The techniques used to improve readability of the code are - Adding Comments, Using meaningful variable names, Indentation (Indenting Loop or Selections blocks). In each technique’s discussion should be based on following topics: Benefits Drawbacks Examples of actual code What problems may arise if the technique is not used
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 5 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Scenario for Part 2 Create a system that enables to calculate an Employee’s Annual Salary. Each employee has a Basic Pay and he/she can do overtime. Also, there will be a tax deduction. The system should function as follows and all errors should be handled: The system should allow to enter Employee Name, Basic Salary and Overtime hours. Overtime rates are different according to an employee’s basic salary. Following are three ranges (bands): Band 1 (£20.00) - > Basic Pay less than £20,000.00 Band 2 (£30.00) -> Basic Pay between £20,000.00 and £40,000.00 Band 3 (£35.00) -> Basic Pay over £40,000.00 There will be an annual 20% of tax deduction from employee’s basic pay. However, an employee is eligible for a tax free amount of £9,440 (annually), which means there will be no tax if an employee’s basic pay is below £9,440.00 (overtime is not taxable). Final Itemised pay slip should display following information (the final amounts should be displayed in two decimal points): Employee Name: xxxxxxx Basic Pay: Overtime: Gross Pay: Tax Deduction: Net Pay:
Hrs (xx.xx)
Rate (xx.xx)
xxxxx.xx Amount (xxxxx.xx) xxxxxx.xx xxxxxx.xx xxxxxx.xx
Hints: Overtime = overtime hours * overtime rate Gross Pay = Basic pay + Overtime Net Pay = Gross Pay – Tax amount Format (35000.962, "#0.00")
Tasks for Part 2 Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 6 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Task 2.1 – P6 Based on the part 2 scenario, create following design documentations: 1) A numbered list of features that your program is expected to contain 2) A design for each screen in your program (form Layouts) – Decide which forms you need and then design their layouts. Annotate these designs to show the name you intend to give each form and control, e.g. txtName, intage, frmDetails, lblAmount, etc... 3) Variable List – Use following table: Variable name
Scope (Local or Global)
Data Type
Used For
4) Structure Diagrams – Draw structure charts to identify the different procedures in the system 5) Event Descriptions – For each event, e.g. a button click or leaving a text field, describe in detail what you want your program to do. Use following table: Form Name
Events functions
/ Used for
Pseudocode code
Task 2.2 – M2 Based on your program design in P6, create a document in which you justify: Data types you have chosen for the variables The way you have structured the system, e.g. by splitting into a number of different procedures
Task 2.3 – D2 Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 7 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Develop an algorithm using pseudocode to represent your program in P6. Annotate (comment) the algorithm to make it clear what they are doing and how they are doing it. Annotation should also indicate how the design requirements are being met.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 8 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Work to be submitted Unit Record Sheet Assignment Front Sheet Following assignment evidence should be ed into eME using template provided in eME:
A presentation which covers the different types of programming approaches. P1
A report covering how languages are chosen with specific reference to Visual Basic, Java and C++. P2
Explanation of the purpose of each basic structure, a short working VB.NET program with explanation on how the program will work, VB.NET interfaces and pseudocode for each program P3
Brief report covering data types, importance of choosing the correct data type for a variable and the problems occur when an unsuitable data type is used. P4
A presentation on the software development life cycle and software structures. P5
The design documentations for Part 2 scenario. P6
A report explaining why good programming practice is needed by professional programmers. M1
A report on your reasons for choosing the data types of the variables for the program and the way you structure the system in the scenario for part 2. M2
A detailed report on the factors which make code more readable. D1
The algorithm using pseudocode for the program described in the scenario for part 2 of this coursework. D2
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 9 of 10
SOFTWARE DESIGN AND DEVELOPMENT
EdExcel Recommended Sources: Textbooks Knuth D — The Art of Computer Programming: Volumes 1–3, 2nd Edition (Addison Wesley, 1998) ISBN 0201485419 Wender K — Cognition and Computer Programming (Intellect Books, 1995) ISBN 1567500951 Websites Visual Basic .NET Programming for Beginners Available at: http://homeandlearn.co.uk/NET/vbNet.html Visual Basic Developer Center Avalable at: http://msdn.microsoft.com/en-us/vbasic/ms789056
Tutor Handouts Please see the area for this unit on eME for these materials as well as on www.edulevel.com.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 10 of 10
Software Design Development
Assignment S/W Design and Development
Date Set :
Review Date :
Date Due :
16th September 2013
22nd April 2014
23rd May 2014
and
SOFTWARE DESIGN AND DEVELOPMENT
Learning outcomes to be partially or fully covered 1
Know the features of programming languages
2
Understand the principles of software design
3
Be able to use tools to demonstrate software designs.
Grading criteria To achieve the criteria 6.P.1 Describe the application and limits of procedural, object oriented and event driven programming paradigms. 6.P.2 Describe the factors influencing the choice of programming language. 6.P.3 Explain sequence, selection and iteration as used in computer programming. 6.P.4 Outline the benefits of having a variety of data types available to the programmer. 6.P.5 Explain the role of software design principles and software structures in the IT Systems Development Life Cycle. 6.P.6 Use appropriate tools to design a solution to a defined requirement.
To achieve the Merit criteria 6.M.1 Explain the importance of the quality of code. 6.M.2 Justify the choice of data types and software structures used in a design solution.
To achieve the Distinction criteria 6.D.1 Discuss the factors that can improve the readability of code. 6.D.2 Develop algorithms to represent a design solution.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 2 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Scenario for Part 1 You are working as a senior programmer in a LeSoCo software developing company. Some of the lower level employees would like to be programmers but don’t know where to start. Your manager asked you to create a set of presentations and documents which will introduce these employees to the concepts they need before they start programming properly.
Tasks for Part 1 Task 1.1 – P1 Prepare a presentation on Procedural, Object-Oriented and Event Driven programming approaches (paradigms). In each approach you should explain: Use of the approach Example of different computer language/s including coding. Disadvantages what sort of applications the approach would not be normally used for
Task 1.2 – P2 You need to explain to your audience why you will be using Visual Basic 2010 when some have heard that C++ programs run much faster and that Java programs can run on any computer. In your comparison on Visual Basic 2010, C++ and Java, you should take into the following factors: 1) Organisational policy 2) Suitability in of available features and tools 3) Availability of trained staff 4) Reliability 5) Development and maintenance costs 6) Expandability
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 3 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Task 1.3 – P4 Write a document with following three sections: 1) Using the following table explain at least six VB.Net data types available to the programmers. Data type
Description
Space Occupied
Range
Example
2) Why the choice of data type for a variable is important and what problems can arise if an unsuitable data type is used?
Task 1.4 – P3 Sequence, Selection and Iteration are three basic structures which can be used to build a program. Create a document with following seven sections. In each section, you need to explain the purpose of the structure, a short working VB.NET program with explanation on how the program will work, VB.NET interfaces and pseudocode for each program. (In the program, use comments, proper indenting and the correct naming of variables) 1. Sequence 2. Iteration (Loops) Pre-check (Do While … Loop) Post-check (Do… Loop Until) Counted loops 3. Selection (Condition) IF IF … ELSE Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 4 of 10
SOFTWARE DESIGN AND DEVELOPMENT
CASE Task 1.5 – P5 You are concerned that they understand that sitting down and writing code is not a good option, so you want them to know about Software Design Principles and Software structures. Create a presentation on following: The development life cycle and its stages Software Structures – Functions, Parameter, Procedures, classes, objects and Readability
Task 1.6 – M1 Amateur programmers use a range of short cuts which work fine for small programs. However, professional programmers need to write robust, extensible and understandable code. Create a document with examples which explains why each of the following attributes is important of the quality of code: 1) Robust 2) Usability 3) Portability 4) Maintainability
Task 1.7 – D1 Write a detailed discussion on how to ensure that code is readable for other programmers. The techniques used to improve readability of the code are - Adding Comments, Using meaningful variable names, Indentation (Indenting Loop or Selections blocks). In each technique’s discussion should be based on following topics: Benefits Drawbacks Examples of actual code What problems may arise if the technique is not used
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 5 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Scenario for Part 2 Create a system that enables to calculate an Employee’s Annual Salary. Each employee has a Basic Pay and he/she can do overtime. Also, there will be a tax deduction. The system should function as follows and all errors should be handled: The system should allow to enter Employee Name, Basic Salary and Overtime hours. Overtime rates are different according to an employee’s basic salary. Following are three ranges (bands): Band 1 (£20.00) - > Basic Pay less than £20,000.00 Band 2 (£30.00) -> Basic Pay between £20,000.00 and £40,000.00 Band 3 (£35.00) -> Basic Pay over £40,000.00 There will be an annual 20% of tax deduction from employee’s basic pay. However, an employee is eligible for a tax free amount of £9,440 (annually), which means there will be no tax if an employee’s basic pay is below £9,440.00 (overtime is not taxable). Final Itemised pay slip should display following information (the final amounts should be displayed in two decimal points): Employee Name: xxxxxxx Basic Pay: Overtime: Gross Pay: Tax Deduction: Net Pay:
Hrs (xx.xx)
Rate (xx.xx)
xxxxx.xx Amount (xxxxx.xx) xxxxxx.xx xxxxxx.xx xxxxxx.xx
Hints: Overtime = overtime hours * overtime rate Gross Pay = Basic pay + Overtime Net Pay = Gross Pay – Tax amount Format (35000.962, "#0.00")
Tasks for Part 2 Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 6 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Task 2.1 – P6 Based on the part 2 scenario, create following design documentations: 1) A numbered list of features that your program is expected to contain 2) A design for each screen in your program (form Layouts) – Decide which forms you need and then design their layouts. Annotate these designs to show the name you intend to give each form and control, e.g. txtName, intage, frmDetails, lblAmount, etc... 3) Variable List – Use following table: Variable name
Scope (Local or Global)
Data Type
Used For
4) Structure Diagrams – Draw structure charts to identify the different procedures in the system 5) Event Descriptions – For each event, e.g. a button click or leaving a text field, describe in detail what you want your program to do. Use following table: Form Name
Events functions
/ Used for
Pseudocode code
Task 2.2 – M2 Based on your program design in P6, create a document in which you justify: Data types you have chosen for the variables The way you have structured the system, e.g. by splitting into a number of different procedures
Task 2.3 – D2 Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 7 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Develop an algorithm using pseudocode to represent your program in P6. Annotate (comment) the algorithm to make it clear what they are doing and how they are doing it. Annotation should also indicate how the design requirements are being met.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 8 of 10
SOFTWARE DESIGN AND DEVELOPMENT
Work to be submitted Unit Record Sheet Assignment Front Sheet Following assignment evidence should be ed into eME using template provided in eME:
A presentation which covers the different types of programming approaches. P1
A report covering how languages are chosen with specific reference to Visual Basic, Java and C++. P2
Explanation of the purpose of each basic structure, a short working VB.NET program with explanation on how the program will work, VB.NET interfaces and pseudocode for each program P3
Brief report covering data types, importance of choosing the correct data type for a variable and the problems occur when an unsuitable data type is used. P4
A presentation on the software development life cycle and software structures. P5
The design documentations for Part 2 scenario. P6
A report explaining why good programming practice is needed by professional programmers. M1
A report on your reasons for choosing the data types of the variables for the program and the way you structure the system in the scenario for part 2. M2
A detailed report on the factors which make code more readable. D1
The algorithm using pseudocode for the program described in the scenario for part 2 of this coursework. D2
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 9 of 10
SOFTWARE DESIGN AND DEVELOPMENT
EdExcel Recommended Sources: Textbooks Knuth D — The Art of Computer Programming: Volumes 1–3, 2nd Edition (Addison Wesley, 1998) ISBN 0201485419 Wender K — Cognition and Computer Programming (Intellect Books, 1995) ISBN 1567500951 Websites Visual Basic .NET Programming for Beginners Available at: http://homeandlearn.co.uk/NET/vbNet.html Visual Basic Developer Center Avalable at: http://msdn.microsoft.com/en-us/vbasic/ms789056
Tutor Handouts Please see the area for this unit on eME for these materials as well as on www.edulevel.com.
Unit 6 - 2950460554 Written By: Shalini fernando Verified By: Nicholas Kakou
Page 10 of 10
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