The phrase "a chart has been" is correct and usable in written English.
It can be used when discussing the existence or status of a chart in a particular context, often in reports or analyses.
Example: "A chart has been created to illustrate the sales trends over the past year."
Alternatives: "a chart was made" or "a chart has been produced."
Finally, an algebraic expression along with a design chart has been developed to provide a convenient way for designers to estimate the peak contact force in deterministic terms for a range of hailstorm scenarios.
To implement the use of such silencer practically in controlling noise at different dominant frequency ranges, a design chart has been established for searching the optimal bending stiffness and corresponding stopband at different geometries.
To make the litigation more manageable, a severity chart has been created to classify injuries in six major disease categories by type and seriousness, a classification scheme that will help the court pick a sample of cases.
To prevent these problems, service blueprinting as a flow chart has been effectively employed.
A bioclimatic chart has been developed in this study for subtropical climatic zones in Queensland, Australia, and is discussed in this section.
A growth chart has been used to monitor infants' length and weight at different ages [ 6].
Based on a preliminary analysis, a "HCC forecast chart" has been developed, which can predict 5-year posttransplant survival rates on the basis of morphological tumor characteristics (Fig. 1).
A cumulative control chart has been developed in this paper to particularly facilitate the monitoring of targets.
A comprehensive monitoring chart has been developed by the Government of Bangladesh, which describes patient details, vital signs, clinical signs, treatments given, feeding practices, an intake-and-output chart, and outcomes of these practices.
