WHAT IS A FLOWCHART?
A flowchart is a visual diagram that represents the sequence of steps in a process or system. It uses symbols like arrows, rectangles, and diamonds to show actions, decisions, and the flow of control. Flowcharts help in understanding, planning, and communicating the structure and logic of a process.
A flowchart links to computational thinking by visually representing the problem-solving process, which is central to computational thinking. It breaks down complex tasks into smaller, manageable steps (decomposition), identifies decision points (conditional logic), and shows the sequence of operations (algorithm design). Flowcharts help in systematically planning and organising code, making abstract concepts concrete and easier to implement in programming.
Q. HOW CAN FLOW CHARTS HELP TO PLAN FOR A SYSTEMS/CODE PROJECT?
Flowcharts are valuable tools in planning systems-based projects that utilise coding, as they provide a visual representation of the logical flow and structure of the system. Here's how they can be used:
1. Defining the Sequence of Events:
Mapping the Process: Flowcharts help in laying out the entire sequence of events or processes that the system will follow. This includes every step that needs to occur, from the input (e.g., sensor data) to the output (e.g., triggering a response).
Identifying Key Actions: By visually representing each action, decision, and outcome, flowcharts make it easier to understand how the system will function from start to finish.
2. Visualising Decision Points:
Clarifying Conditional Logic: Flowcharts are particularly useful for representing decision points in a system, where the flow of events changes based on specific conditions (e.g., “If the light is red, then stop the vehicle; if green, proceed”).
Optimising Code Structure: By seeing these decision points mapped out, developers can more easily code conditional statements and loops, ensuring the system behaves as intended under different scenarios.
3. Simplifying Complex Systems:
Breaking Down Components: For systems-based projects that involve multiple interacting components (e.g., sensors, actuators, user inputs), a flowchart can break down the system into manageable parts. Each component's role and interactions are clearly defined, making the overall system easier to understand and implement.
Modular Design: Flowcharts can also help in designing modular code, where different parts of the system (represented as different sections of the flowchart) can be coded separately and then integrated.
4. Error Identification and Debugging:
Predicting Potential Issues: By visualising the entire system, flowcharts can help identify potential errors or logical inconsistencies before any code is written. This preemptive identification can save significant time in the debugging process.
Troubleshooting: When issues arise, the flowchart can serve as a reference to trace the problem back through the system, making it easier to pinpoint the exact location and nature of the error.
5. Communication and Collaboration:
Shared Understanding: Flowcharts provide a common visual language that team members can use to discuss and refine the system’s design. This ensures that everyone involved has a clear understanding of how the system is intended to function.
Documentation: A flowchart serves as a valuable piece of documentation that can accompany the code, providing context for how the system was designed and how it operates. This is especially useful for future maintenance or further development.
6. Optimising and Refining the System:
Iterative Design: As the system evolves, the flowchart can be updated to reflect changes or optimisations in the code. This iterative process helps ensure that the final system is as efficient and effective as possible.
TASK
As a group, discuss what your designed system will be and do
Map out, as a flowchart, all possible sequence and series of events in the system, in the order that they will or could happen
Create your flowchart by hand on the worksheets available or digitally using CANVA (or similar)
Add a scan, screenshot or photo of your completed flowchart to the planning portfolio slide - you will refer back to this when developing your system
TOOLS TO HELP YOU
BE SURE TO ADD EVIDENCE TO EACH TEAM MEMBER'S PORTFOLIO