Before Market materializes, it exists as a latent market. Eg: Need for a faster means of calculation –satisfied by Abacuses, Slide Rules, Adding m/c.
Hand held electronic calculator as an option; Entrepreneur has to decide on the set of attributes – physical size, no. of mathematical functions etc.
Customers want - four basic arithmetic functions /scientific/ commercial %, decimal /handheld vs. desk top --- a condition where buyer preference scatter uniformly spread is called a D iffused Preference M arket.