The lazy user model of solution selection (LUM) is a model in information systems proposed by Tétard and Collan[1] that tries to explain how an individual selects a solution to fulfill a need from a set of possible solution alternatives.
The model draws from earlier works on how least effort affects human behaviour in information seeking[2] and in scaling of language.
[3] Earlier research within the discipline of information systems especially within the topic of technology acceptance and technology adoption is closely related to the lazy user model.
The user need defines the set of possible solutions (products, services etc.)
All of the solutions in the set that fulfill the need have their own characteristics; some are good and suitable for the user, others unsuitable and unacceptable – for example, if the user is in a train and wants to know what the result from a tennis match is right now, he/she may only use the types of solutions to the problem that are available to him/her.