At some point, you stop unpacking the parts and start putting them together. What's true for flat-pack furniture is also true for spacecraft, so Lockheed Martin has begun the Assembly, Test and Launch Operations phase of NASA's INterior exploration using Seismic investigations, geodesy and heat transport (InSight) Mars lander.
Scheduled to launch in 2016, the unmanned InSight probe will be the first deep-drilling mission sent to the Red Planet. According to Lockheed, the start of ATLO will see the lander being assembled over the next few months. This will include the installation of experiments in the main chassis, along with avionics, power, telecommunication, thermal, guidance, navigation, and control systems. This will be followed by extensive environmental testing before final vehicle assembly and launching.