Warm Up #9 What is a system?

Technology and the Design Process Lesson 4: Technology Systems

Essential Questions How are subsystems different than systems? What is the difference between open-loop systems and closed-loop systems? How are automatic controls different than manual controls? What is life cycle analysis?

Understanding Systems System – a group of parts that work together in an organized way What is an example of a system? In what way is the federal government a system? Subsystem – smaller systems that exist within larger systems How are subsystems related to systems?

Diagramming Systems What does a diagram show? Open-loop system – when a system has no way to measure or control its product Includes 3 parts: Input – the resources, ideas, and activities that determine what needs to be accomplished (idea) Process – the conversions of ideas or activities into products by using machines and labor (action) Output – what the system produces (outcome)

Diagramming Systems Closed-loop system – a system that has a way of automatically controlling or measuring its output Contains everything from an open-loop system and includes: Feedback – the part of the system that measures and controls the outcome of the system Serves as a bridge between input and process Ex: heater in fish tank turns off when it reaches a certain temperature

Diagramming Systems Controls are any part of a system that can be adjusted Manual control – a device that requires a human operator Automatic control – a device that can be programmed and then continues to operate without human intervention Feedback and control systems are important to keep systems running smoothly with little human involvement

What is a life cycle? Stages of a product’s life cycle include: design, material extraction, material processing, manufacturing, packaging and transportation, use and reuse, and recycle or disposal Life cycle analysis – a way of estimating the environmental impact of a product through its entire life

Review When you send a text message, you are part of a communication system that uses input, process, and feedback. What part of the communication system is creating a text message, sending a text message, and receiving a text message? Fill in the graphic organizer to show the flow of a closed-loop system.