Potassium Chloride in NaCl, 20 mEq/100 mL Bag

IV FluidsEssential, 95% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days65219000601

Stock position

On hand
1,013 bag17.2 days of supply
On order
92 bagfirst arrives Mon Sep 14
Forecast rate
59.1 bag/daynext 30 days
Demand over 4 days
255 baglead time plus review period
Safety stock
79 bagempirical 95th percentile of forecast error
Reorder point
334 bagabove
Stockout
Thu Oct 1
Recommended order
noneby Tue Sep 29
Inventory value
$3,444at $3.40 per bag

How the forecast was made

Exponential smoothing9% weekly error, under-forecast2% better than naive

A weighted recent average that learns the weekday pattern and any trend. Recent days count more than old ones.

Report card: the model was fit on history up to Tue Jul 21 and scored on the 56 days after. Weekly totals were off by 9% on average (27% day by day), and it under-forecast by 8% overall. A same-weekday-last-week guess would have been off by 10%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21384402+185%
Tue Jul 28446401-4510%
Tue Aug 4435400-358%
Tue Aug 11519400-11923%
Tue Aug 18395399+41%
Tue Aug 25439399-409%
Tue Sep 1394398+41%
Tue Sep 8460398-6213%
All 8 weeks3,4723,197-2758%

Weekly totals in bag. Error is forecast minus what was used, so a positive number means the model ran high. This window was hidden from the model when it was fit.

Demand forecast

last 180 days and the next 30
064127todayreport card windowThu Mar 19Wed Oct 14
actual forecast, 80% and 95% range what the model said during the report card windowbag/day

The model only knows the usage history. If you know something it does not, a coming surge, a new service line, a product being dropped, adjust the forecast and the stock math follows.

Projected on hand

0safety stock 79runs out Thu Oct 1tomorrowTue Oct 6
Projected on hand, bag: today's stock plus open orders on their expected dates, minus the forecast, day by day.

Lots and expiry

Earliest-expiry-first simulation against the forecast. Waste is what remains in a lot on its expiry date.

LotQuantityExpiresDaysUnit costProjected waste
L000991,013Sat Jul 24313$3.400 bag · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per bagInvoices90-day spendPairing
Harborline Pharmaceuticals65219000601POTASSIUM CHLORIDE 20 MEQ/100ML BAG EAEA of 1$3.1231$12,878NDC exact
Cobalt Rx DistributorsCRX-01836POTASS 20MEQ/100ML BAG 1CTEA of 1$3.2413$5,680reviewed 0.90