Score supplier OTD percent from promised vs actual dates with a grace-day window and tier labels. The workbook becomes the system of record; Apps Script owns the joins and business rules so analysts are not pasting monthly formulas.
Entry point `scoreSupplierOtd` reads typed columns with SpreadsheetApp batch APIs. SpreadsheetApp is the primary service; Time-driven describes how you usually invoke it after authorization.
Keep thresholds (grace days, bands, alert emails, API keys) in Config cells or Script Properties so the same .gs file promotes from sandbox to production without code edits.
This page is technical only: sheet layout, edge cases, runnable code, deploy steps, and FAQs for score supplier on-time delivery. No consulting pitch—just the pattern you can paste and harden.
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Sheet / project setup
| Tab | Columns | Notes |
|---|---|---|
| Deliveries | PO, Supplier, Promised, Actual | Source |
| OtdScore | Supplier, OTD, Tier | Output |
What this script does
scoreSupplierOtd() score supplier OTD percent from promised vs actual dates with a grace-day window and tier labels.
- Grace-day window
- OTD% by supplier
- Tier A–D
Prerequisites
Container-bound script on the workbook that contains the tabs in the setup table. Authorize SpreadsheetApp scopes on first run.
- V8 runtime
- Exact sheet names
- Script timezone = ops timezone
Walkthrough
Compare actual vs promised+grace, roll OTD% by supplier, map to A–D tiers.
Paste the code, set Config/Properties, run scoreSupplierOtd once, verify the output tab, then attach a Time-driven trigger.
Edge cases
Grace days use calendar days; set OTD_GRACE_DAYS in Script Properties for carrier realities.
Testing
Use a sandbox copy with 3–5 known rows. Compute expected outputs for score supplier on-time delivery offline, run scoreSupplierOtd, and diff the output tab including one intentional bad row.
Hardening
Add LockService around multi-sheet writes if triggers can overlap. Log run timestamps. Keep API keys and alert emails in PropertiesService—not in shared cells.
Variations
Fork ideas: filter to one business unit, change grain (daily→weekly), or POST a summary payload after scoreSupplierOtd succeeds.
Operations notes
Assign an owner for the output tab, document regenerate steps, and treat `scoreSupplierOtd` as source of truth over ad-hoc cell formulas.
Full code: scoreSupplierOtd()
Run scoreSupplierOtd when source tabs are current. Edit sheet names and Config/Properties first.
function scoreSupplierOtd(){
const GRACE=Number(PropertiesService.getScriptProperties().getProperty('OTD_GRACE_DAYS')||1);
const ss=SpreadsheetApp.getActive();
const rows=ss.getSheetByName('Deliveries').getDataRange().getValues().slice(1);
const agg={};
rows.forEach(r=>{
const supplier=String(r[1]);
const promised=new Date(r[2]), actual=new Date(r[3]);
if(!agg[supplier]) agg[supplier]={n:0,onTime:0};
agg[supplier].n++;
const limit=new Date(promised.getTime()+GRACE*86400000);
if(actual<=limit) agg[supplier].onTime++;
});
const out=Object.keys(agg).map(s=>{
const a=agg[s];
const pct=a.n? a.onTime/a.n : 0;
const tier=pct>=0.95?'A': pct>=0.85?'B': pct>=0.75?'C':'D';
return [s,a.n,a.onTime,pct,tier];
});
const sh=ss.getSheetByName('OtdScore');
sh.clearContents();
sh.appendRow(['Supplier','Shipments','OnTime','OTD','Tier']);
if(out.length) sh.getRange(2,1,out.length+1,5).setValues(out);
}- Line 1: Entry point — bind triggers to scoreSupplierOtd.
- Line 2: Script Properties for thresholds/secrets.
- Line 4: Batch read; avoid per-cell getValue in loops.
- Line 23: Batch write output rows in one setValues call.
- Line 6: Rename sheet constants before production.
Deploy this example
- 01
Open Apps Script
In the bound spreadsheet: Extensions → Apps Script. For standalone projects, create one at script.google.com and link your Sheet by ID.
- 02
Paste and save
Add a .gs file, paste the code below, rename constants at the top (sheet names, column letters, API property keys), then save.
- 03
Authorize once
Run the main function from the editor. Accept OAuth scopes when prompted — triggers cannot run until authorization succeeds once.
- 04
Add the trigger
Triggers → Add trigger → choose the handler function and event (time-driven, on edit, or on form submit). Delete test triggers before production.
Before you run: score supplier on-time delivery
- 1Setup tabs exist with headers matching scoreSupplierOtd
- 2Dry-run on a copy workbook
- 3Timezone verified
- 4SpreadsheetApp authorization completed
- 5Output spot-checked against hand calc
- 6Time-driven trigger added only after validation
- 7Owners + alert recipients documented
Frequently asked questions
At minimum the tabs listed in the setup table for Score Supplier On-Time Delivery. Output tabs may be cleared each run—do not store source-of-truth data there.
Run from the Apps Script editor for dry runs. Production usually uses a Time-driven trigger after OAuth succeeds once.
Grace days use calendar days; set OTD_GRACE_DAYS in Script Properties for carrier realities.
Per-cell calls burn quota and wall time. One read + one write keeps this pattern under the 6-minute execution cap longer.
PropertiesService (Script Properties) for API keys and alert inboxes. Config sheet is fine for non-secret thresholds.
Simple ratios maybe; score supplier on-time delivery needs joins, branching, or side effects (email/Docs/API) that Apps Script handles cleanly.
Keep the .gs in clasp/git. Avoid divergent copies of formulas on the output tab—regenerate from the script.