As a result of the feedback the state received -- and with the benefit of real evidence of teacher impact on growth in student learning from almost 20,000 teachers -- the department recommended a number of changes to the teacher evaluation system.
The AIDS epidemic has also brought vast changes to the Food and Drug Administration, accelerating the evaluation of new drugs.
The year group in which students were enrolled was included to the model as a time invariant predictor of change to enable the evaluation of the effectiveness of the programme between the intervention group (year 1) and comparator group (year 2).
Failure to qualify for the 2010 Stanley Cup playoffs resulted in changes to the team's management and evaluation structure.
Each of these findings would be used to suggest changes to the next iteration of this evaluation tool.
If results are favourable, it is anticipated that changes to the intervention, study methods and evaluation procedures will be made before a pilot cluster-RCT is conducted.
In the Netherlands, this was an effective way to convince people to participate, although it was instituted at the same time as several other changes to the recruitment procedures, making formal evaluation difficult.
It said: "The changes to the Cancer Drugs Fund process include re-evaluation of a number of drugs on the list... which will include, for the first time, an assessment of a drug's cost alongside its clinical benefits".
Evaluation of changes to the health system, such as training staff and providing additional equipment, also needs to take account of, and measure if possible, unintended positive or negative consequences, as well as the impact of extraneous factors, such as a policy change, or change in the environment external to the heath system, such as extremes of climate.
