The phrase "assessment has been based" is correct and usable in written English.
It can be used when discussing the criteria or foundation upon which an evaluation or judgment has been made.
Example: "The final grade for the course has been based on a combination of exams, projects, and participation."
Alternatives: "evaluation has relied on" or "appraisal has been founded on".
Japan's assessment has been based largely on computer models showing heavy emissions of radioactive iodine and cesium from March 14 to 16.
The assessment has been based on two of the most important criteria for the evaluation of docking methods, i.e., the ability of known ligands to enrich the top positions of a ranked database with respect to molecular decoys, and the consistency of the docking poses with crystallographic binding modes.
As a result, risk assessment has been based on analyses of individual unsaturated carbonyls and their respective toxicities.
Traditionally, competence assessment has been based on duration of training and a required minimum number of examinations performed [ 1- 4].
In most studies, exposure assessment has been based on self-reported use with only a few exceptions utilizing network operator records [ 4- 6].
The development of the FRAX® models for fracture risk assessment has been based on a programme of work undertaken at the WHO Collaborating Centre for Metabolic Bone Diseases at Sheffield University.
The usual approaches used in ecological risk assessment have been based on individual and population level standard procedures.
Until now, Nassau's assessments have been based on an archaic system using 1938 construction costs and ignoring the essential factor of location.
However, despite there being an abundant literature on this subject, most comparative assessments have been based on a limited number of experimental farms and, therefore, conclusions are not as robust as desired.
There has been concern recently that some assessments have been based on untested or incomplete mechanistic hypotheses.
Evidence of human hazard associated with exposure to phthalates is limited, and risk assessments have been based primarily on results of animal studies.
