For your dev, test and production environments, what is the size ratio between environments?

Sizing of individual environments depends on what you plan to do with each environment. There are baselines in the hardware requirements documentation to help give you an idea of what would be required based on a few usage patterns.

docs.appian.com/.../System_Requirements.html

More in depth sizing recommendations would require information about your business needs, whether you have existing environment or are bringing up new environments, and what your usage will look like. An architect can translate those data points into hardware sizing that will best fit your needs.

Sizing of individual environments depends on what you plan to do with each environment. There are baselines in the hardware requirements documentation to help give you an idea of what would be required based on a few usage patterns.

docs.appian.com/.../System_Requirements.html

More in depth sizing recommendations would require information about your business needs, whether you have existing environment or are bringing up new environments, and what your usage will look like. An architect can translate those data points into hardware sizing that will best fit your needs.