How many waves do I have to survive to get an increase in galactic readiness?

I was playing around a bit in multiplayer mode alone in a private game to try out some stuff and noticed that I don't get any improvement in galactic readiness if I fail in one of the early waves.

So I wondered how many waves I do have to survive to get some increase to galactic readiness? I assume that I only get the full bonus if I finish all waves, but from which wave on do I at least get a partial bonus? And how much of the maximum bonus do I get at each possible step?

I did a quick experiment myself and didn't get anything for dying during the third wave, so there seems to be some minimum requirement before you get any increase in galactic readiness.

Solution 1:

Completing objective levels will raise your readiness.

Solution 2:

ME3 Multiplayer Galactic Readiness Galaxy At War points / percentage increase mechanics per match / wave

These options does not affect galactic readiness points

Bronze or Silver or Gold or Platinum or Any Difficulty.
Reaper or Cerberus or Geth or Collector or Random Enemy.
When you quit a mission or get kicked out (90 seconds idle in a public match) of a mission then you don't get any points, xp or credits.
When your team dies, you get points for completed objectives, XP and credits.

Random map

Gives points to all sectors (max = 3 x 5 = 15 points per match).
+1 for every completed objective.

6th wave strategy (team death after completing objective in wave 6)

It takes 6 waves easy to get first 2 points and 5 tougher waves to get the last point.

PROS: fast killing because of easy enemies in early waves.
CONS: In a public match, it may be difficult to get your team killed after completing the objective of the 6th wave.

Specific map

Gives points to map-specific sector (max = 7 points per match).
+1 after 3rd wave objective.
+2 after 6th wave objective.
+4 after 10th wave objective.