The phrase "a method to ascertain" is correct and usable in written English.
It can be used when discussing a technique or approach for determining or finding out information.
Example: "We need to develop a method to ascertain the effectiveness of our new marketing strategy."
Alternatives: "a way to determine" or "a technique to find out".
Although the yarn pull-out test is a recognized method to ascertain yarn mobility within a weave, the physics governing yarn pull-out has not yet been fully examined, and previous finite element models were unable to reproduce the results of yarn pull-out tests.
Their study was hospital-based, used a different outcome (distant metastasis), as well as a different method to ascertain aspirin exposure (based upon patient recall during the receipt of definitive radiotherapy).
Evidence was considered to be insufficient if a paper used a selective study population and/or an inappropriate method to ascertain data, or if it did not provide enough information to be able to determine a grading.
Logistic regression was used as a multivariate method to ascertain which variables independently predicted CR.
Logistic regression was used as a multivariate method to ascertain whether the UGT1A1 genotype independently predicted toxicities significantly related to this variable in previous univariate analysis.
The objective review process to determine CSAEs and also their causes, as shown in figure 1B, uses a systematic method to ascertain whether there was clinical evidence to indicate insufficiencies in the BMP 9 13 14 or a definite error.
If proved effective for Rapid Participatory Appraisal, this would mean that it may be a valuable method to ascertain baseline measures of health and social needs, could be adapted to local situations, and used to monitor various indicators.
Having a robust method to ascertain the reliability of results enables the community to move forward with adopting new treatments, especially if we are confident that they are safe.
