• Value analysis / list comparison• Design of experiments• Feasibility study / producibility assessment - Suggestion to perform a detailed study for this feature 1.1.2 Actions in the production development • Preliminary process capability studies / machine capability studies• Proof of serial capability• Feasibility study / producibility assessment - Suggestion to perform a detailed study for this feature• In the process development, check and define the need of production attempts on a larger scale 4.4 Identification of special characteristics 4.4.1 Features specified by the customerAll features specified by the customer (released customer drawing) are to be adopted directlyBasically, all features with the meaning 9 to 10 and an occurrence higher than 7 in the FMEA must be checked on "special feature".4.4.2 Identification of the special characteristic, internalBasically, all features with the meaning 9 to 10 and an occurrence higher than 7 in the FMEA must be checked on "special feature".The decision is made as to whether a feature has to be considered as a special feature according to the decision matrix in the appendix 33.01c (1, 2) .xls.4.5 Symbolic, markings, conversion table and interaction to the FMEA 4.5.1 Symbols and conversion tableThe special characteristics are identified by the following symbols:BM = special featureF1 = Category Function and the operating numberE as external or I as internThis table is maintained in the APIS by the headquarters in the FMEA software under palette entries: