Presentation on theme: "Slide 1 Today you will: Review knowledge and understanding of systems Understand what a system is and what it consists of Apply this understanding by working."— Presentation transcript:
Slide 1 Today you will: Review knowledge and understanding of systems Understand what a system is and what it consists of Apply this understanding by working through the input, process and output of example systems Arrange different processes of a system in order What is the systems life cycle?
Slide 2 What is a system? A computer system ‘may include hardware, as well as software and manual procedures’. BCS Glossary of computing terms
Slide 3 What makes up an information system? Input Process Output Temperature and rainfall from a variety of places Analyse the information and present graphically Web pages for holidaymakers to help them decide when and where to go
Slide 5 Washing machine Input: Wash programme, water, washing powder Process: Match amount of water, temperature to programme Output: Clean washing
Slide 6 Pelican crossing Input: Pedestrian presses walk button Process: Has the set amount of time gone by? Output: Activate the light sequence
Slide 7 Making tea Pour tea into cup Put teabag in pot Fill kettle Add milk Put the instructions in the right order. Identify any instructions that are missing.
Slide 8 Start Put tea in pot Milk? Stop Pour milk into cup Boil water Add water No Wait until brewed Yes Milk? Pour milk into cup Yes Sugar? No Pour tea into cup Yes Add sugar Making tea Drink tea
Slide 9 In a flowchart everything is in a sequence. What does that mean? What would happen if you swapped the first and third activities What would happen if you swapped the milk and sugar around? Question Time
Slide 10 In a flowchart everything is in a sequence. What does that mean? One event at a time, in the right order What would happen if you swapped the first and third activities It wouldn’t make sense or very nice tea What would happen if you swapped the milk and sugar around? It wouldn’t matter
Slide 11 Cooking a celebration lunch Prepare main dish Put main dish in oven While main dish cooks, prepare vegetables Put potatoes on to cook Put vegetables on to cook Arrange all times to coincide with main dish being ready Lay table
Identify Outline of the problem Analyse The needs of the system Evaluate Refining the system Design Planning all parts of the system Implement Creating the system Test Making sure the system works System life cycle