Personally I do not know of any deterministic way judging acclimatization. Right now, the actions to be taken are more "Reactive". i.e, in case one feels the symptoms of AMS, then one can take a call of going down or camping at the current altitude to get acclimatized.
As a thumb rule, if you climb higher, and sleep lower, your body should get adjusted to the altitude. Having said that, each person's response is different.
Below are some of the points to consider:
- If anyone in your group is complaining of not-so-good sleep, it can be an indicator of acclimatization not being complete.
- Nausea, headache, dizziness, lack of coordination(ataxia) are some of the things that can give you pointers towards those who are yet to acclimatize or are already hit by a moderate to severe case of AMS.
The best suggestion of moving towards a higher camp would be to judge the spirit and the Real health conditions of your group. The above mentioned points can be taken into mind before you take your call of sending people down or moving up the mountain.
I would always suggest that you prepare your group to prevent AMS as much as possible. I'm pretty sure that you know the following set of points, but in the interest of the community, let me put them forth anyway.
- Hydrate. Drink 3-4 liters of water. The symptoms of dehydration and AMS are cunningly similiar: Headache, dizziness etc.
- Eat well. Keep your energy reserves up all the time.
- Climb high, sleep low. It's advisable not to gain more than 1000 vertical feet if you are going to sleep at the higher altitude.
- Take it easy. Do not rush up to higher altitudes. Higher the altitude, slower should be the progress made. This allows for body to get adjusted to thinner air.
- Avoid depressant drugs. These reduce the rate of breathing which in turn reduce the intake of oxygen.
- There are drugs like Diamox which help one to get acclimatized faster. Remember, this is not a cure to AMS.
- In case of AMS symptoms, consider going to lower altitudes.
Hope this helps!