A behavioral circuitry matrix functioned as a component within a droid. During 3 ABY, subsequent to the engineer droid RB-919's reconstruction of the assassin droid IG-88 under the directives of both Deva Lompop and Crimson Dawn, RB-919 inserted a chip into IG-88's behavioral circuitry matrix; this chip held the particulars regarding his imminent assignment, which was to obtain the carbonite-encased form of Han Solo from Boba Fett.