Blood Culture Bottle Set, Aerobic/Anaerobic

Lab & SpecimenEssential, 95% service targetPrimary vendor Meridian Medical Supply, lead 1.5 days, ordered every 7 daysMMS-449208

Stock position

On hand
484 pair11 days of supply
On order
0 pairnothing open
Forecast rate
43.9 pair/daynext 30 days
Demand over 9 days
404 pairlead time plus review period
Safety stock
63 pairempirical 95th percentile of forecast error
Reorder point
467 pairabove
Stockout
Fri Sep 25
Recommended order
noneby Tue Sep 22
Inventory value
$2,517at $5.20 per pair

How the forecast was made

Exponential smoothing10% weekly error, unbiased11% 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 10% on average (27% day by day), and it showed no systematic bias. A same-weekday-last-week guess would have been off by 12%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21390304-8622%
Tue Jul 28322304-186%
Tue Aug 4307304-31%
Tue Aug 11297304+72%
Tue Aug 18327304-237%
Tue Aug 25287304+176%
Tue Sep 1233304+7130%
Tue Sep 8340304-3611%
All 8 weeks2,5032,431-723%

Weekly totals in pair. 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
052104todayreport card windowThu Mar 19Wed Oct 14
actual forecast, 80% and 95% range what the model said during the report card windowpair/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 63runs out Fri Sep 25tomorrowWed Sep 30
Projected on hand, pair: 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
L00009484Fri Apr 23221$5.200 pair · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per pairInvoices90-day spendPairing
Meridian Medical SupplyMMS-449208BLD CULT BTL SET AER/ANAER CS/50CS of 50$4.6913$12,436AI 0.73
Northwind Health DistributionNW4549791Blood Culture Bottle Set, Aerobic/Anaerobic - 50/CsCS of 50$5.0113$5,257AI 0.88
Summit Clinical ProductsSC-076894BLD CULT BTL SET AER/ANAER 50CSCS of 50$5.027$2,508AI 0.73