Presentation on theme: "a) Define a computer system b) Describe the importance of computer systems in the modern world c) Explain the need for reliability in computer systems."— Presentation transcript:
a) Define a computer system b) Describe the importance of computer systems in the modern world c) Explain the need for reliability in computer systems d) Explain the need for adherence to professional standards in the development, use and maintenance of computer systems e) Explain the importance of ethical, environmental and legal considerations when creating computer systems.
We’re surrounded by a multitude of computer systems in every day life that: › Keep us safe › Enable us to do our jobs › Entertain us › Run our homes › Enable us to communicate with other people
Apart from obvious (laptops\PCs) Embedded computer system to control functions. Handles complex wash cycle Ensures correct amount of water is used Water heated to correct temp.
Embedded computer systems – invisible Developed by engineers – Easy life
Set top satellite box Contains a computer system that: › Checks subscriber account is valid – reads inserted smart card › Handles channel decryption › Electronic Program Guide › Handle recording & playback Blue Ray\DVD player TV – stream content from internet Smart Phone
Heavily reliant on CS’s to do job effectively Help to create professional work Hopefully mistake free Collaboration – work with people on other side of the world, from home & on the move. Share documents Teleworking
X-Rays, CAT\MRI scanners, blood analysis IV & radiotherapy machines Monitoring: blood pressure & heart rate Admin systems: patient booking stock control NHS wasted £12 billion on computer system that was never used
School network – hot desking Library system Attendance system (SIMS) Biometric systems
Online ticket booking system Touch screens – ticket printing Projector & audio system Air conditioning system
Very complex supply chain – where correct item needs to be in right place at right time. (from bread rolls to a tank) Logistics handled by systems that track items using barcodes & RFID
Weapon systems with sophisticated on- board CS – pin point accuracy Connects to GPS satellites to work out its current path in real time
Command & control – chain of command (Iraq – 120,000 US troops) General issues orders to officers – officers to troops etc Requires reliable, tough comms. System Military systems include: › Digital radio backpack › Sophisticated satellites
21 st century soldier “situational awareness” is key term Imagine platoon where all soldiers know where their comrades are in real-time – through helmet mounted graphical display. Connect to RT video feeds from hovering cameras. Becoming reality – computer systems are at the heart
Almost 100% reliant on CS’s we need to be able to trust that they will be reliable. When they go wrong it can range from being an inconvenience to life threatening.
Tesco Bank – customers still unable to access online accounts – several days – computer glitch. Vodaphone mobile network disrupted after break-in at its exchange Facebook says its suffering its worst shutdown in 4 years
Many computer systems have thousands \ millions of lines of code Limitless pathways through them Testing is vital to ensure systems are reliable Testing very expensive & time consuming – many bugs are missed
They’re everywhere Take for granted their impact on our lives