Every single action will be specified a fixed length (in hrs) and come about only on one working day (Take note that it is possible for an exercise to finish following 7pm). A constraint can refer to the commence and finish time of an action or to the day https://livebackpage.com/story13066090/%E4%BB%A3%E5%86%99%E8%AE%BA%E6%96%87-for-dummies