the use of evolutionary prototypes (SSADM adopts the adage that a picture is worth a thousand words, RAD goes a step further and advocates that a working model is worth a thousand pictures);
matumizi ya prototypes evolutionary (SSADM antar adage kwamba picha ni ya thamani maneno elfu, RAD huenda hatua zaidi na watetezi kwamba mtindo kufanya kazi ni thamani kuliko watu elfu picha);