The part of a sentence "considerable efforts were made" is grammatically correct and commonly used in written English.
It can be used to describe a significant or substantial amount of effort that was put into a particular action or task. Example: "In order to complete the project on time, considerable efforts were made by the entire team, including working overtime and weekend shifts."
In recent years, considerable efforts were made to develop energy systems planning models with consideration of GHG emission reduction under uncertainty (Voropai and Ivanova [2002]; Cai et al. [2009a, b]; Lin et al. [2010]; Wu et al. [2010]; Yan et al. [2010]).
Although, considerable efforts were made, the basic understanding of the dominating deformation/damage mechanisms is still deficient.
Considerable efforts were made in the past 15 years to develop strategies for the optimization of steel frames with semi-rigid connections, concentrating on the frames and not the connections, which were designed after the rest of the structure had been optimized.
Considerable efforts were made to encourage Fulani to settle during the 1980s including building an administrative headquarters, roads, dams and cattle dips.
Considerable efforts were made, however, to capture transdiagnostic dimensional data, including personality structure, and vulnerability factors such as exposure to trauma.
Taking this as a point of departure, in the course of the twentieth century considerable efforts were made to reduce urban density wherever possible, and to separate the various uses (housing, commerce, industry, etc).
Considerable efforts are made to integrate ecosystem services (ES) indicators into spatial planning practice.
Considerable efforts are made to obtain the semi-global finite-time uniformly bounded (SGFTUB) stability by employing the Lyapunov theory.
Working on any non-trivial real world problem requires considerable efforts be made to work out all the details needed for fully automated testing with no human intervention.
Considerable efforts are made to ensure that the blindness of raters is maintained.
It is vital, therefore, that considerable efforts are made to try and overcome these obstacles.
