augmentGrid             Augment a grid of candidate designs with type 1
                        and type 2 error probabilities, expected sample
                        sizes and probabilities of early termination
createGrid              Create a grid of candidate designs
obtainDesign            Finds optimal and minimax designs for either
                        Simon's 2-stage or Mander & Thompson studies
powerPlot               Plot the power curve(s) for the given design(s)
searchBounds            Obtain default bounds for the construction of
                        the search grid.
