Science and Engineering Practices - 3-5.SEP1.3:
Define a simple design problem that can be solved through the development of an object, tool, process, or system and includes several criteria for success and constraints on materials, time, or cost.

Disciplinary Core Ideas - S.3-5.ETS.1.1.DCI:
ETS1.A: Defining and Delimiting Engineering Problems •Possible solutions to a problem are limited by available materials and resources (constraints). The success of a designed solution is determined by considering the desired features of a solution (criteria). Different proposals for solutions can be compared on the basis of how well each one meets the specified criteria for success or how well each takes the constraints into account.

Crosscutting Concepts - CC8.1:
People’s needs and wants change over time, as do their demands for new and improved technologies