With the update of December 2015, a number of new features were introduced to the game. One of these was the ability to construct Epic Projects.
The idea is that you place the Department of Epic Projects building, that then allows you to convert existing completed buildings into Epic Project Buildings based on one of the specialisations that your City has.
What's the point of this? Well these Epic Project buildings will generate part of a single speed up token every day. The speed up tokens then allow one of your crafting businesses to work faster for a set period.
The catch is to get the best speed up tokens, you have to complete an insanely difficult number of tasks within 24 hours.
The bronze token, is pretty easy to attain you only need 10 points, but the silver and gold tokens are extremely difficult to attain - personally I have given up and my advice for standard players is to just focus on the bronze tokens because the payback is just not worth it in my opinion.
Don't focus on just the bronze projects. The more progress you make in the building's construction, then the outcome of the building will be different. The amount of points you have when a project's construction is finished will affect the way the building looks when it is finished. Plus, you can obtain more valuable speed-up tokens.
Every is complaining about the difficulty to obtain the gift of speeding up the game. I have completed 6 epic projects, 1 silver, 5 gold, it just takes planning. 1- storage 300 or greater. 2-manufacture 5 of everything and then max out the que for items being produced, focus on long production time items. 3- build special buildings which correspond to the epic challenge. Example Gambling challenge build luxury casino 3 points per sale. Each special buildings has a point value 1,2, or 3. Focus on 3 point special buildings, built with golden keys. 4-build up a store of speed up tokens. 3-4 gold or 8-12 silver. Lastly simolens, you will need to spend a long time in the market place to bridge the gap between production items to make the goal. Once you get a silver, gold is only a small planning step away.
Good luck, it is difficult, but can be done
I've found if you built up your stores before you start, you can get a pretty decent head start. It also gets easier as you can use your speed-up tokens - the more you have the easier it is to complete the tasks. Also, in your inventroy before you begin the tasks, don't hold onto items that can be made in less than half an hour (bricks, chairs, flour, seeds, minerals, etc). Prioritize items that take the longest to make (Animal seed, fuses, fire pits, etc). You can easily get to silver this way (clear your inventory of any specialized items before you start.)
It takes 3 days to make a bronze token, 6 days for silver, 8 days for gold, NOT a token per day.
Also start with 250,000 simoleans so you can buy as much as possible.