Discrete Time domain choose a fixed sample period 8 all events happen at multiples of e simple extension of classical models ■ main disadvantage— how to choose? obig→ too coarse model o low 8= time fragmentation, too big state space usage: particularly synchronous systems(hardware circuitsDiscrete Time Domain ◼ choose a fixed sample period ε ◼ all events happen at multiples of ε ◼ simple extension of classical models ◼ main disadvantage — how to choose ε ?  big ε  too coarse model  low ε  time fragmentation, too big state space ◼ usage: particularly synchronous systems (hardware circuits)