"method of adjustments" is correct and usable in written English.
You can use it when you need to refer to a process of making changes or corrections in order to meet a certain standard. For example, "To account for the changing markets, the company needed to develop a method of adjustments to their operating strategy.".
"The use of a slide hammer to adjust door and tailgate strikers is an industry standard method of adjustment in instances where the striker has a floating nut plate," Tesla wrote.
A further comment should be made on the method of adjustment in azimuth.
We discuss a simple method of adjustment that deals with this problem.
The two main experiments were conducted with the use of a novel variation on the method of adjustment.
In the method of adjustment, the subject -- not the experimenter -- varied the magnitude of the stimulus, and indicated when it (or a change) became detectable.
It will then, of course, work correctly; and this method of adjustment is easier to effect as well as being more accurate than the use of a tiny compass, liable to gross error through stray magnetic field.
A Bayesian method of adjustment is developed in order to re-estimate the principal components of the gamma heating and to transpose the results obtained to the devices of the RJH.
For example, the present study used the psychophysical forced-choice method for measuring the response of visual CS, while Castro and colleagues used the psychophysical method of adjustment.
The contrast sensitivity was measured to visually achromatic sinusoidal grating with a spatial frequency of 0.2 to 30 cycles per degree of visual angle (cpd), using the psychophysical method of adjustment (Castro et al., 2009).
We are therefore confident that the suggested under-estimate in the observed HIV prevalence rate is valid, and our mortality-based procedure provides a reasonable method of adjustment of the observed HIV prevalence rates.
