A Design is not effective if it loses too much meaning when compared down for letterheads, covers, and small promotional details. The design also has to look great when used for longer formats, such as banners, advertisements, and automated formats such as TV and the Web. The most positive way to determine if a design works at all sizes is to really test it yourself.
Note that the shortest scale is normally the hardest to get best, so start by printing the logo design on a letterhead or cover and see if it is still legible.
You can also test for large-scale rendering by printing a poster-sized report at a photo store. You can use many design techniques when designing a logo, and to pick the best one, you should have some knowledge information about the customer and the brand.
