A Great Logo Must Be Functional
Classically functional.

Logos are the most important marketing pieces for a company because it must represent that company in many different contexts and still get the message across. A logo may be seen on the web, in a brochure, on a t-shirt, or on glassware. It could be used on dark backgrounds, on light backgrounds, on textured surfaces, or could be used in various sizes like on an awning or on a postcard. A major indication of a poorly designed logo is graphic effects that can be added in Photoshop like 3D embossing, shadows, glares, or photo imagery. It’s important to know that simplicity does not mean that the logo is missing anything. In fact, to aid in functionality, the logo must be simple.
Ouch! Nice homework assignment.

A great logo must have the ability to be printed or used in all of the contexts mentioned above and still represent the company effectively. A few things that are important when talking about functionality are the simplicity, scalability, color, and depth. It’s important to the functionality of a logo that it’s not too intricate and that it doesn’t incorporate things like gradients or shadows as integral parts of the design. When the logo is reduced in size or placed on a loud background, it should retain its integrity. In addition, the logo should allow for two color presentation, such as black on white, as it would be on a t-shirt.