The needs to combine selection of materials (SM) processes
during the early stages of design have previously been realized. In this
work, an attempt is made to ensure that there is no gap between function
oriented design and the material. A methodology is being developed, for a
concurrent qualitative selection of materials method (CQSM) that takes into
consideration the importance of materials properties in the early design
stages. The method is modified from quantitative method called weighting
property method used for selecting materials in the detailed design stage.
The method was modified to qualitative method; it means that the input data
for materials property of the design must be qualitative data which
consisting of groups or sub-groups of materials, range value properties and
approximate values. By giving weight to the degree of importance of the
properties, a developed database is search for the best group that can satisfy
the CQSM. In the present investigation, a new numerical method has been
build by using visual basic developed select materials for mechanical design
in conceptual stage. This method, which is based on weighting property
method (WPM) uses a new digital logic (DL) comparison with the
traditional (DL) makes the result more accurate because it does not
elimination problem of the least important criterion.