RT Journal Article SR Electronic A1 Samek, Andrzej T1 The Activities Changing the State of The Object in the Machining and Assembling Process and their Formalization JF Communications - Scientific Letters of the University of Zilina YR 2000 VO 2 IS 1 SP 17 OP 21 DO 10.26552/com.C.2000.1.17-21 UL https://komunikacie.uniza.sk/artkey/csl-200001-0003.php AB The machining and assembling processes are discrete sequences of activities causing the change of semi-products into the finished parts, and assembling the parts into the final product. In computer aided process planning the precise and formalized description of activities is necessary. In the paper a conception of formalization of the activities changing the part characteristic is presented. The proposed description may be useful for process planning.