In grounding RTD in Creswell's framework, we argue that many types of designing can be a respected research method when they comply with the respective rules.
There are many types of design professions, and some of them are not well known outside the design industry.
Many types of experimental designs are based on Latin squares.
Many types of flap design have been introduced for the treatment of cleft palate.
As an international research facility, the W7-X project hosts many types of components designed not only by the Max Planck Institute for Plasma Physics (IPP) teams, but also by external partners.
Many types of response surface designs are used for optimization like Central composite, Doehlert, and Box Behnken.
There are many types of face cleansers designed for factors such as the age of the user, skin quality, type of dirt, and personal preferences.
In despite of so many types of solar reactors designed for solar detoxification purposes, few attempts have been made for photocatalytic hydrogen production, which in our option, is one of the most promising approaches for solar to chemical energy conversion.
There are also many types of safety spikes, designed to give traction to an ice adventurer, should he break through.
Fishing can also be selective on certain life history traits; many types of fishing gear are designed to remove some individuals in preference to others (Todd and Larkin 1971; Hamley 1975; Law 2000; Kuparinen et al. 2009).
When modelling the dynamic response of an existing structure to predict the effects of design modifications, many types of forces are difficult to characterize, e.g., those due to unsteady flows or acoustic excitation.
