Preparing and Interpreting Technical Drawing (PITD)

• 2D


  • Two dimensional, objects that are rendered visually on paper, film or on screen in two planes representing width and height
• 3D


  • Three-dimensional or something that has width, height and depth or length

  
• Technical Drawing


  An act or discipline of creating models or plans to build something through designs. It includes blueprints, schematics and diagrams that communicate how to construct a product, device, machine, highway, or home
• Types of Technical Drawing


  • Schematic Diagram
  • Charts
  • Block Diagrams
  • Lay-out Plans
  • Pictorial Diagram
• Schematic Diagram


  A picture that shows something in a simple way, using symbols. A picture that represents the components of a process, device or other object using abstract, often standardized symbols and lines

  
• Charts


  A graphical representation of data. A flowchart is a graphical representation of decisions and their results mapped out in individual shapes

  
• Block Diagrams


  A visual representation of how parts of an object relate to each other and work together
• Lay-out Plans


  A floor plan is a scaled diagram of a room or building viewed from above. The floor plan may depict an entire building, one floor of a building, or a single room
• Pictorial Diagram


  Uses pictures to represent the different components of a particular system. Pictorial diagrams can vary in level of detail

  
• Basic Symbols of Flowchart


  • Terminator
  • Process
  • Decision
  • Input and Output
  • Connector
  • Arrow Lines
• Terminator


  A small rectangle with curved corners. A terminator appears at the start and at the end of a flowchart. The end terminator appears only once on a single flowchart
• Process


  A rectangle. It refers to an action in a business process. It must be described clearly and concisely. A process can be described using a single verb noun phrase
• Decision


  A diamond. A process that can answer a decision of "yes" or "no" requires a decision box
• Input and Output


  The Parallelogram features Input and Output, which cover such things as materials, services, and even individuals going into or exiting the process
• Connector


  A small circle or a connector box and is labelled using letters. A flowchart written on a single page is clearer than a flowchart on several pages. A connector ensures that the processes are connected logically and correctly on several pages
• Arrow Lines


  Arrow lines drawn in one direction, preferably from top to bottom, keep a flowchart clear. Avoid arrow lines that loop because this could indicate redundancy in the business process
• How to create a Flowchart


  1. Identify Tasks

  2. Organize and Document Tasks

  3. Test