2. What’s a SYSTEM ? “ A system is … a set of interrelated parts , all of which work together toward a defined goal.” Dick, Carey & Carey, 2005, p. 1
3. What’s a SYSTEM ? “ The sum total of parts working independently and working together to achieve required results or outcomes, based on needs.” Kaufman, 1972, p. 1
4. What’s a SYSTEM ? “… a set of elements standing in interrelations .” Bertalanffy, 1968, p. 55
5. What’s a SYSTEM ? It’s 15 C Turn ON the heater It’s 22.5 C Turn OFF the heater heat