Is this experimental approach called "method of bisection"?

I would like to know the correct name of an experimental approach. The description is as follows.

In doing enzyme reaction experiment, if people want to find out, say, the optimal reaction temperature, they will repeat the reaction several times with different reaction temperatures and then go to measure, say, the concentration of reaction product. To increase the efficiency of the experiment (assume the equipment needs booking), people may do a series of, say, five temperatures, and take all the five product for measurement in one lot.

After that, by plotting the concentration vs. temperature graph, people can obtain a trend and may hopefully see the peak at particular temperature. As the five temperatures were coarsely separated, a precise temperature was not obtained. Therefore, people will need to repeat the experiment with temperature around the previous peak one.

What is the correct name of this kind of experimental approach?