What so enternaining for Simcity players, is about how to plan to achieve the goal. Players should set their goal and make a prioritize during a period. that’s way, there are competitions and time-period systems.
Say, if you participate in competition and choose a task to make 10 shovels, then you need to estimate how many metal, wood and plastic needed. During the process, you may limit the use of wood to make another goods. The trade-off is only time that you need to scarifice if you don’t focus to your goal.
However, time-buying is allowable since the game provide token 🙂