Principles ofengineering design

Summary Thepaper setsoutprocedures usedinengineering design bylisting thevarious steps ina sequential pattern. Thispattern isnotuniversally applicable and thevariants onitdepend onthetype ofproblem involved andtheinformation available. Of critical importance isthewayinwhichmodels-physical or mathematical-can beconstructed anddepending on these, three design methods aredescribed. Thesetypes areillustrated byreference toanumber ofmedical aids which havebeendesigned.