This schedule slows down around the quartz inversion zone and holds both on the way in and out of each (up and down ramps).
This assumes a large piece that requires slow heatup and cooldown to prevent thermal gradients. If you are firing pieces that are thinner and lighter then steps 2, 4, 6 and 8 could likely be set to a faster rate.
138°C/hr to 121C
250°F/hr to 250F
111°C/hr to 518C
200°F/hr to 965F
41°C/hr to 629C
75°F/hr to 1165F
111°C/hr to 1148C
200°F/hr to 2100F
55°C/hr to 1204C
100°F/hr to 2200F
83°C/hr to 629C
150°F/hr to 1165F
41°C/hr to 518C
75°F/hr to 965F
83°C/hr to 121C
150°F/hr to 250F
Start temperature assumed: 25°C or 75°F
"Fahrenheit degrees" is not the same as "degrees Fahrenheit".
A 100° reading on a Fahrenheit thermometer is equal to a 37° reading on a Celcius thermometer.
But "100 Fahrenheit degrees of temperature change" is equivalent "55 Celsius degrees of change".
That is an important distinction to understand the above temperature conversions.
Quartz Inversion In ceramics, this refers to the sudden volume change in crystalline quartz particles experience as they pass up and down a temperature window centering on 573C.