## Percent of units experiencing conditions

## Percent of units experiencing conditions

(OP)

Hello, I could use some help estimating the percentile of units experiencing mulitiple conditions.

A product can be installed in a wide range of environments. These effect the temperature of the product. There are three variables that have the biggest impact:

T = Room temperature

D = Distance to a local obstruction

H = Heat from a nearby product

For any given set of conditoins (T, B or H) we can calculate the resulting product temperature. Also for any condition (T, B or H) we can estimate percentile of products above/below that value. For example, a 21C room is at the 50th percentile, 30C room is at the 84th percentile, etc.

I would like to combine this info in a meaningful way. For example, we have several scenarios for T, D and H. How can I calculate the percentage of units that will experience each scenario? Or better, the number of units that will experience a certain temperature level?

A product can be installed in a wide range of environments. These effect the temperature of the product. There are three variables that have the biggest impact:

T = Room temperature

D = Distance to a local obstruction

H = Heat from a nearby product

For any given set of conditoins (T, B or H) we can calculate the resulting product temperature. Also for any condition (T, B or H) we can estimate percentile of products above/below that value. For example, a 21C room is at the 50th percentile, 30C room is at the 84th percentile, etc.

I would like to combine this info in a meaningful way. For example, we have several scenarios for T, D and H. How can I calculate the percentage of units that will experience each scenario? Or better, the number of units that will experience a certain temperature level?

## RE: Percent of units experiencing conditions

## RE: Percent of units experiencing conditions

## RE: Percent of units experiencing conditions

For condition T1-D1-H1, you would find the probability of that combination (lets call it P111) by mulitplying: t1 x d1 x h1

Etc. for remainining combinations.

It should work out that the sum of all combinations = 1.0

But it might not due to rounding errors, or if you didn't get the original weighting functions to sum to 1.0 for whatever reason...so I would just renormalize that sum to 1.0, i.e. figure out a factor to multiply it that gets the sum back to 1.0; then each individual combination value P111 could be multiplied by the normalization factor to get you to the final answer.

## RE: Percent of units experiencing conditions

## RE: Percent of units experiencing conditions

## RE: Percent of units experiencing conditions

Cheers

Greg Locock

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## RE: Percent of units experiencing conditions