BASIC GUIDELINES FOR PRODUCT SKETCHING
Within the field of product design, ability to represent your ideas by using effective visual method such as sketching opens doors for better communication between designers and clients. Designers find that using sketching is an efficient way to speed up the process of developing ideas in the real life. There are times where sketch can express more than words and you get an instant understanding of a concept. Sketches are useful for designers who work in groups and sketches can deliver easy and fast way to brief an idea to others.
READ ON (TO SOURCE) USEFUL TIPS FOR ALL SKETCHERS!