Math problem.

Koen J · Sep 17, 2015 09:43:30 AM

I have read this post.

https://support.upwork.com/entries/23103173

And below is where I'm not clear.

(successful contract outcomes - negative contract outcomes) /total outcomes = job success rate

does it make sense? If I finished a job with negative outcome, I get -100%?

I think the below one makes sense.

(total outcomes - negative contract outcomes) /total outcomes = job success rate

I'm not that great in Math, so forgive me if I'm wrong.

Dawn L · Sep 17, 2015 12:50:51 PM

@Koen J wrote:
I have read this post.
https://support.upwork.com/entries/23103173

And below is where I'm not clear.
(successful contract outcomes - negative contract outcomes) /total outcomes = job success rate
does it make sense? If I finished a job with negative outcome, I get -100%?

I'm not the greatest at math either (just ask my husband! LOL!) but the way I understand it is like this:

(successful contracts - unsuccessful contracts) / total contracts

So, for instance, if you have 15 successfully completed contracts, and 3 unsuccessfully completed contracts (or negative feedback) for a total of 18 total contracts, the JSS would be calculated like this:

(15-3) / 18 = JSS%

Again, I could be completely wrong on this, and I am truly horrible with math, but this is how I understand it lol.

Someone please correct me if I'm misunderstanding this lol.

Vadivelan R · Sep 17, 2015 05:20:31 PM

@Koen

You are right!! I felt the same when I first read that entry sometime back.

Lets say, I did two jobs, one success and the other ends in failure. My JSS should be 50% right? According to their calculation:

JSS = ( Success - failure ) / Total Jobs

JSS = (1-1)/2 * 100 = 0% ??

Lets assume I failed both jobs:

JSS = (0-2)/2 * 100 = -100% ??

It should be, as you said:

JSS = ( Total Jobs - Failures / 2 ) * 100

( 1 success, 1 failure ) JSS = ( 2-1 / 2 ) * 100 = 50%

( both failure ) JSS = ( 2-2 / 2 ) * 100 = 0%

I think that they implemented correctly, but not properly explained in that article.

Dawn L · Sep 17, 2015 05:30:09 PM

Lol I don't know. To be honest, personally the mathematical equation they're using doesn't matter to me too much when the algorithm is buggy anyway, or we don't have enough information to actually understand the true JSS calculation.