The importance of identical working practices
Since every astronaut can fail during the mission, the other team members must be able to take over his or her scientific tasks at any time. Especially for laboratory work it is therefore crucial that all team members train the exact same procedure. This is particularly important when dealing with liquids, as different pipetting techniques and pipetting habits could massively corrupt the row of results – and since conventional scales are useless in zero-gravity, astronauts will have to rely on volumetric data instead of weighing out masses. Thus, astronauts not only have to learn how to pick the right pipette to handle challenging liquids but also how to do the maintenance on their own. At the very least, non-astronauts are spared the professional calibration and maintenance of the pipettes – on Earth, this is ideally done by the manufacturer.
To train and educate all team members in exactly the same way is also a very good idea for any laboratories on planet Earth, as this improves the flexibility of the team while securing the quality of results.