Its an old article - from this issue
http://www.musicradar.com/computermusic/computer-music-166-july-issue-on-sale-now-455790 The magazine was making a "chill out" track from scratch, using soft synths (and one vocal sample). They got each sound (piano, drums, bass, pads, guitar etc) ready, with effects etc, and tracked out the song. They also added some effects to the master bus.
Then, to the mixing, and here I use their words :
"Let's get mixing! With our master bus effects bypassed, we bounce each of our seperate parts down as WAV files and normalise them all."
They then set up a new DAW project, and re-loaded the master bus effects. Then, in their words :
"We set the mixer faders for the stems to -5.0dB". And way they went in the mixing process.