As the ordinary was developing, numerous designs offered safer alternatives, including tricycles, gearing to allow smaller front wheels, and treadle drives to lower the pedals and the rider.
A complex system has numerous interdependent sub-systems, each of these having several design alternatives and variable conditions of use which affect the choice of technological solutions and environmental performance.
Numerous design decisions proved disastrous.
There were two main design alternatives to the broadside.
Shortcut methods are valuable tools in the early stages of chemical process design, where numerous flowsheet alternatives need to be evaluated to determine the most energy-efficient, feasible flowsheet.
An arrangement design problem of a submarine can also be difficult to solve due to the number of compartments and equipment placed in the limited space, as well as the numerous potential alternatives for the arrangement design.
The process-group based synthesis method is developed on the basis of the computer aided molecular design methods and gives the ability to screen numerous process alternatives without the need to use the rigorous process simulation models.
Numerous antibiotic alternatives, such as pre- and probiotics, have been proposed but show variable success.
There are numerous different design options, and different actors may promote different alternatives.
Assessing the performance of solar heating and cooling systems, especially cooling systems using solar thermal or photovoltaic driving energy, in a common comparable format, is complicated by the numerous, alternative energy sources and design possibilities.
Table 1 lists the numerous alternative manners of designating a SNP in major databases.
