Candle temperature margin planner

Purpose and output structure

This planner is a screening calculator for candle shipments. It compares a supplier melt onset with an expected package exposure and checks a calendar transit interval for weekend days. It does not determine a safe shipping temperature, certify a candle, or replace a transit test. The outputs are Margin below melt onset in °F, Temperature screen, and Weekend exposure. The notes remind you to use measured package-temperature profiles and exact wax technical data, and that a forecast alone does not establish parcel temperature. The tool is useful for comparing dispatch choices and exposure assumptions before a qualified transit test.

Entering melt onset and exposure

Enter Your wax supplier melt onset in °F from the exact wax technical data for the wax system in the finished candle. Do not substitute a generic wax category value. Enter Expected package exposure in °F as the package condition you want to screen, preferably from a measured profile. The calculator does not convert units or adjust the exposure for fragrance, blend, container, wick, or dwell. Those factors remain outside the model. The result limitations specifically call out fragrance, blend, container and dwell. If you only have an air forecast, treat the entered exposure as an assumption and confirm it with measurement.

How margin and screen are calculated

The margin is melt onset minus expected package exposure. A negative margin means the entered exposure is above the supplied onset. A zero margin means the two values are equal. A positive margin means the entered exposure is below the supplied onset. The temperature screen uses the branch margin less than or equal to zero: At or above supplied melt onset. Otherwise it returns Below supplied melt onset; softening still possible. The screen is binary and does not grade severity or produce a pass result.

Counting calendar transit and weekends

Calendar transit days are whole calendar days, not business days. The dispatch weekday sets the starting point, with Monday as the first weekday and Sunday as the last. The planner checks the dispatch day plus each following calendar day for the entered transit days, so it examines one more calendar day than the number of transit days. If any checked day is Saturday or Sunday, Weekend exposure reads Included in calendar transit. Otherwise it reads Not included. This is a weekday flag only. It has no holiday calendar, carrier cutoff, time-of-day, or delivery exception logic.

Worked examples

With melt onset 120 °F, expected exposure 130 °F, three calendar transit days, and Monday dispatch, the margin is -10 °F. The screen reads At or above supplied melt onset. The checked days are Monday, Tuesday, Wednesday, and Thursday, so Weekend exposure reads Not included. The negative margin and the weekend flag are independent outputs.

With melt onset 120 °F, expected exposure 110 °F, three calendar transit days, and Friday dispatch, the margin is 10 °F. The screen reads Below supplied melt onset; softening still possible. The checked days are Friday, Saturday, Sunday, and Monday, so Weekend exposure reads Included in calendar transit. Changing exposure changed the margin and screen, while changing dispatch changed the weekend flag.

Why input changes affect different outputs

Melt onset and expected exposure feed only the margin and temperature screen. Raising melt onset raises the margin. Raising expected exposure lowers the margin. Calendar transit days and dispatch weekday feed only the weekend flag. Increasing transit days expands the checked interval. Moving dispatch later can pull a Saturday or Sunday into that interval. The planner does not combine weekend exposure and temperature into a single risk score, so read the three outputs separately.

Edge cases and interpretation

A margin of exactly zero triggers At or above supplied melt onset because the branch includes equality. A positive margin can still show softening is possible, and weekend exposure can be included even when the margin is positive. With Saturday dispatch and one transit day, the checked days are Saturday and Sunday, so the weekend flag is included. With Thursday dispatch and one transit day, the checked days are Thursday and Friday, so it is not included. The model does not handle partial days, holidays, or multiple shipment legs.

Practical use and documentation

Record the melt onset source, the basis for expected exposure, the dispatch weekday, the calendar transit days, and all three outputs. Re-run the planner when wax supplier data, packaging, route, or dispatch timing changes. Use the result as a screening checklist alongside measured package-temperature profiles and a qualified transit test. The limitations remain: no generic wax melting point or safe-temperature guarantee, and fragrance, blend, container, and dwell can change performance. Confirm with exact wax supplier data and a finished candle test.

Questions about candle temperature margin planner