Levofloxacin in Dextrose, 750 mg/150 mL Bag

Anti-infectivesEssential, 95% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days00143931724

Stock position

On hand
232 bag16.5 days of supply
On order
17 bagfirst arrives Tue Sep 15
Forecast rate
14.0 bag/daynext 30 days
Demand over 4 days
60 baglead time plus review period
Safety stock
22 bagempirical 95th percentile of forecast error
Reorder point
82 bagabove
Stockout
Fri Oct 2
Recommended order
noneby Wed Sep 30
Inventory value
$1,508at $6.50 per bag

How the forecast was made

Exponential smoothing16% weekly error, under-forecast7% 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 16% on average (34% day by day), and it under-forecast by 5% overall. A same-weekday-last-week guess would have been off by 17%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 218495+1113%
Tue Jul 2810495-99%
Tue Aug 46495+3148%
Tue Aug 1111995-2420%
Tue Aug 1811395-1816%
Tue Aug 2512395-2823%
Tue Sep 19595-00%
Tue Sep 89995-44%
All 8 weeks801758-435%

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
01939todayreport 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 22runs out Fri Oct 2tomorrowWed Oct 7
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
L00029137Thu Dec 31108$6.500 bag · $0
L0003095Mon Feb 14518$6.500 bag · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per bagInvoices90-day spendPairing
Harborline Pharmaceuticals00143931724LEVOFLOXACIN 750 MG/150ML BAG EAEA of 1$6.0431$6,109NDC exact
Cobalt Rx DistributorsCRX-64858LEVOFL 750MG/150ML BAG 1CTEA of 1$6.4613$2,744reviewed 0.90