Starter To complement our notes for Topic 7 & 8, complete a mind map for these two topics on paper – (5 Mins) Project Management & the SDLC Project Failure SDLC

INFO 3: Use of ICT In The Digital World Topic 10: Introducing Large ICT Systems in Organisations (Features and Testing) Electronic Chapter: 11

Objectives At the end of the lesson, students should be able to: - 1.Understand and explain the features of a large ICT System 2.Identify the need for testing on large ICT systems and select appropriate Testing Techniques for large ICT Systems with clear justification for their appropriateness.

Exam Practice 1.No matter how well software is tested, it still needs to be maintained. Explain the types of maintenance that might be needed and why this maintenance is needed, illustrating your answer with suitable examples. (8) 2.Discuss the reasons why users may become increasingly dissatisfied with an implemented ICT solution over time. (4)

Assessment Objectives (Outcome) Grade E/D Standard: Be able to l briefly explain what a large ICT system is, as well as identify some of its key advantages and disadvantages. Achieve more than 40% of the exam style question. Grade C/B Standard: Be able to explain the features of a large ICT system, as well as make reference to real examples used in organisations today. Achieve 60% or more of the exam style question. Grade A Standard Be able to select appropriate testing techniques and justify their suitability for large ICT systems.. Achieve 80% or more in the exam style questions.

Introduction Distributed Systems ICT systems can be used across in multiple organisations, not just one (known as Distributed Systems). For example: Newspaper wholesaler Newsagents will use the same system as the wholesaler (who usually supplies the system), in order to browse and order stock.

Features of Distributed Systems… Many larger organisations have their own custom built systems – can you think of any? Activity 1: In pairs – research and list the pros/cons of using larger distribute ICT systems. (10 minutes)

Activity 2 – Large ICT System Examples In pairs, see how many other large (distributed) ICT systems are used in organisations today. Aim to find at least 2 examples and briefly make notes on how these systems work, as well as some of their key features. (5 minutes)

Features of a Large ICT System Activity 1 – Using the mini whiteboards to note your answers, discuss with your partner what features you would expect from a Large ICT System, compared to a small or medium ICT System. (5 Mins)

Reliability & Testing? Why is this essential? When a new system is developed, extensive testing must be planned to ensure reliable operation – works as expected.

Testing Continued… The main importance of testing is to: – Ensure software compatibility with other ICT systems (remember their needs to be communication) – Looking and predicting potential faults likely to occur and designing tests to identify these errors – Testing software portability onto different platforms or specified hardware?

Testing Large ICT Systems It very important that large ICT systems are reliable for them to be used. Hence it is very important that Large Systems are thoroughly tested. Activity 3 – Look back at the various Testing Techniques we learned last week. Choose which testing techniques would be suited to testing Large ICT Systems and why? (5 Mins) Answers to be briefly discussed as a group

Review Learning - Exam Practice (15 Mins) 1.No matter how well software is tested, it still needs to be maintained. Explain the types of maintenance that might be needed and why this maintenance is needed, illustrating your answer with suitable examples. (8) 2.Discuss the reasons why users may become increasingly dissatisfied with an implemented ICT solution over time. (4)

Summary Hold up the TRUE or FALSE cards to answer the following questions... 1)Many modules is a feature of a large ICT system 2)ICT systems can be used across in multiple organisations 3)“Limited control of the system” is a disadvantage of a distributed system for larger organisations 4)“Shared systems means its cheaper due to costs being shared” is an advantage of a distributed system for smaller organisations 5)The testing of a new system often involves a team of people, testing parts of the system vigorously 6)Predicting potentials faults that are likely to occur is not an important aspect of testing

Assessment Objectives (Outcome) Grade E/D Standard: Be able to l briefly explain what a large ICT system is, as well as identify some of its key advantages and disadvantages. Achieve more than 40% of the exam style question. Grade C/B Standard: Be able to explain the features of a large ICT system, as well as make reference to real examples used in organisations today. Achieve 60% or more of the exam style question. Grade A Standard Be able to select appropriate testing techniques and justify their suitability for large ICT systems.. Achieve 80% or more in the exam style questions.

Objectives At the end of the lesson, students should be able to: - 1.Understand and explain the features of a large ICT System 2.Identify the need for testing on large ICT systems and select appropriate Testing Techniques for large ICT Systems with clear justification for their appropriateness.

Topic 8 Tasks 1.Open the Task sheet “Topic 10: Introducing Large ICT Systems into Organisations (Features and Testing)” worksheet up from Moodle and complete all tasks outlined. 2.Anything you do not complete in lesson, is to be completed as part of your homework. 3.Ask your teacher for a copy of the answers for the exam style questions to self assess your own answers

Homework Revision of objectives learned this lesson. Mind Map of main themes of lesson. Using past exam papers to find and answer questions on the topic covered and then to use the mark scheme to mark the questions. Do some research on the topics of the next lesson coming to the lesson with some ideas already (Topic 10: Introducing Large ICT Systems into Organisations – (Changeover Methods for Large ICT Systems).