CADD or Hand Draft
Computer-aided design, or CADD, is the creation and manipulation of pictures on a computer to assist engineers in design and drafting.
Hand Drafting is the practice of creating drawings by hand with a pencil or ink.
Data Storage & Accessibility
CADD drafting is a computer-based drawing on software that can be saved on a server or cloud which can be stored and can be accessed anywhere in the future.
Manual drawings storage is not that easy as it requires drafting papers to be stored in a larger space and imposed a risk of being damaged easily.
Editing tools can be accessed in CAD software that eases the process of modification in drawings.
Manual drafting requires the need for redrawing & erasing some aspects of drawings that are being changed.
Speed and time
CAD software allows tools to solve the errors and speed up the design process and its evaluation.
Manual Drafting needs rework on the drawing for resolving any corrections and is a time-consuming process.
better quality designs
Better tools are available in the CADD software for the design and proposed design analysis easily. It aids in achieving high quality and accuracy bringing fewer errors.
The manual drawing would need redrawing of components or part of building a structure to improvise any changes in the model.