Fourth, the individual must be able to try the innovation in a setting that they perceive as being comparable to their own situation. A farmer won't adopt a new variety unless it is tried on a farm like his or hers. If it is demonstrated at a well-funded research center, it will be perceived as being different. Fifth, and finally, the individual must be mentally, physically and financially able to adopt the innovation. For each individual, and for each type of innovation, the time elements for each of these stages will differ.
Some people evaluate new ideas slowly but adopt quickly after they've made their decision.
On the other hand, some products or services can be chosen quickly but take a long time to implement. In the diffusion process, the stages are always the same, but depending on the individual or the product, the timing is always different. A Fax machine is like a copy machine and fairly inexpensive, so a business man or woman might be able to choose that product quickly. Products that are like products we have already adopted and are pleased with are easy to adopt. As each individual passes through each stage they will be ready to move on to the next level.