The phrase "achieved by observing" is correct and usable in written English.
It can be used in contexts where you want to describe a result or outcome that comes from careful observation.
Example: "The results of the experiment were achieved by observing the behavior of the subjects over a period of time."
Alternatives: "obtained through observation" or "realized by watching".
The monitoring of autophagic flux in TZM-tfLC3B was achieved by observing fluorescent puncta.
This can be achieved by observing the transformation of spiritual beliefs in the cultural meaning in contemporary lighting design.
An improved understanding of the wire bonding process was achieved by observing the effect of the complex interaction of bonding parameters on the ultrasonic generator signals and degradation rate under thermal cycling.
Compile time analysis is achieved by observing the sequence of operations in the concurrent processes, and by synthesizing a controller program to support the best schedule of operations favoring high throughput.
This is achieved by observing variation in a functional of the solution as the level of dissipation is varied, and it is deduced for certain test-cases that the dissipation alone accounts for the majority of the functional error.
This can be achieved by observing how power is delivered to the data centers' resources, and how these resources are utilized to serve users' jobs.
One of the most important discoveries of the period of about 1430 especially in the work of van Eyck was the multifarious effects a painter can achieve by observing the action of light.
In VET contexts, the most valid and reliable means of determined whether a student has attained a desired competency would presumably be achieved by actually observing the student completing a technical task (such as welding) in an authentic scenario and evaluating the quality of the work they have done.
To a great extent, control over people (power) can be achieved merely by observing them.
Using the self-reported reduction in energy intake, we calculated the percent expected weight loss achieved by subjects (observed weight loss/expected weight loss*100).
Just as Arhats achieved spiritual victory by observing non-violence, so can anyone who follows this path.
