star seller % seems off

[haleymnyc]

The star seller stats seem off to me. I have 100% message rate and a 5.0 average rating, but because of one order shipped two days late, of which I notified the buyer and she was fine with it, and forgot to change the ship date, has dropped my score down to 85%. Big drop down for one order. Each order afterwards shipped on time, four orders I think, has only moved the score up to 89%. This seems mathematically off to me that a 15 point drop down for one order and 1 point up for the other orders?

To not award the start seller badge for something like this seems unrealistically off. Has anyone else had this experience with the star seller calculations? 

[PrimFun]

How many orders over May June and July (which is not yet completed).   Depending on how many orders that one miss yes can lower the score and it can take more than 4 or 5 to get that 95%.  As you get more orders that will help.  However for September, May falls off so if sales drop it may still be hard to get up to 95%.  It is really hard when a shop does not ship often.  It's easier on shops with very high volume. 

Next time you need to delay an order use the Update ship date to send a message at the same time as replying to the message,

[haleymnyc]

I became aware of the shipping update after I saw the drop in %. The late order was in May. There have been 8 orders shipped on time afterwards, 10 total. Yes, if you are not shipping a lot the stats are not going to move fast. This is discouraging for a small seller to meet every goal and be held back over one order that wasn't even an issue with the buyer. 

[audreytherese]

Not sure why you're thinking it's mathematically off, the percentage is all based on the average. The late order is like getting a 1-star review. You must ship 19 orders on-time in order to offset one that is late. How many orders were shipped on-time during the 3-month review period? 

[BagmakerSupply]

@haleymnyc: "This seems mathematically off to me that a 15 point drop down for one order and 1 point up for the other orders?" Unfortunately it is simple math. One order shipped late will hurt more than an additional order shipped on time order will help. To confirm, divide the number of orders shipped on time (with verifiable tracking if applicable) by the total number of orders.

[DesertChains]

The denominator in the formula goes up with each subsequent sale, so new sales have an increasingly smaller impact on the resulting percentage.