The phrase "approach first used" is correct and usable in written English.
It can be used when discussing a method or strategy that was initially introduced or implemented at a certain time.
Example: "The approach first used in this study has proven to be effective in addressing the issue."
Alternatives: "method initially introduced" or "strategy first implemented".
In this work, we derive a computable upper bound for the model in consideration by first introducing a second eavesdropper, an approach first used for a three-node relay channel in [11].
In the second-generation HC-QIs, here the set of covariates for each HC-QI (drawing on the diverse functional, cognitive, clinical, and social items in the CHA assessment instrument) is significantly expanded and a direct stratification approach, first used by interRAI with nursing home quality indicators is employed [ 8].
In these paintings, the artist took an almost mathematical approach, first using graph paper to ensure the complete symmetry of the repeated, precisely arranged shapes that would create an optical effect of moving patterns.
The targeted glycoproteomic approach first uses LAC to enrich for a selected set of protein glycoforms and then uses lectin microarrays to screen for differences in glycosylation patterns in a set of clinical samples.
We chose a two-tiered PCR approach, first using a restriction enzyme digest fingerprinting strategy followed by multiplex PCR for serotypes classified as NT by the RFLP methods [ 9, 10].
Many ingredients and approaches first used by dermatologist brands, such as Murad, are now finding their way into products by giants such as Olay and Avon.
Mt-N genes in platypus and chicken were identified using two approaches, first, using the orthologous genes to the mt-N genes in human and second, using species-specific Gene Ontology annotation (GO 0005739) in Biomart Ensemble Genes 76.
A Fox spokeswoman said the interview approach was first used in 2002.
The conventional ground structure approach is first used for topology optimization.
The common Lyapunov function (CLF) approach is first used to analyze the FTS of affine fuzzy system.
