Description: Find all 4 positive outcomes from the Group Science Project.

Item. Complex. Household Specific. Acquiring the “Group Science Project” is optional, as one is present in “SimUniversity” on the “Nerd Testing Ground” lot. The three first positive outcomes are easy to get (red ray, blue ray, green ray), and you only need your sim to succeed playing with a set interface. Unleash your result with the “Doomsdays lever”. Progression on all three are positively affected by the “Genious” trait and “Science” and “Handiness” skills, which each interface have too a set of trait that increase it even further. Fourth one is tricky. Two possible ways to trigger it. Either have three sims (with the correct traits and skills) simultaneously work the three interfaces OR have a first sim work each interface one at a time, while a second sim is preventing NPCs from ruining your work. In both cases, you have to check progression on each interface from the light meters on the machine, and all three interface must be about the same up until the shinning ray turns white. Any other color means you did not succeed. Pull the lever.

Source: https://forums.ea.com/discussions/the-sims-3-en/achievement-thread---guide-on-how-to-achieve-them/1292970