Facts you already have
Enter a hire, import a roster CSV, collect answers on a survey, or post facts through the API. There is no live HRIS sync yet.
From leave policy to a
decision you can defend
LEAN applies state and employer rules to the facts you have, calculates entitlement and pay, and records the sources and reasoning behind the result.
For the people who have to defend a leave decision
Programs in the engine today include
FMLA, ADA, WA PFML, CO FAMLI, CA SDI / PFL / CFRA / PDL
Who it's for
Same engine. Different conversation.
Pick the page that matches how you work — or keep scrolling for how a determination is made.
Users
Leave specialists and administrators Open the timeline, the Why, and the citation. Send the survey when a fact is missing.Functional buyers
HR and benefits leaders The same rules on every employee. Policy changes go through draft, test, and approve.Executive buyers
Chief people officers and CHROs Risk, cost, and an audit trail. The waiting-period math stays in the engine.Market
PEOs and TPAs Call the Determinations API across employers. Each result still has a Why.Hire, roster, survey, or API — then one answer
Stop piecing leave decisions together by hand
Facts come in from hire, roster CSV, survey, or API. LEAN applies the program to what is known, holds when a fact is missing, and returns one decision with the reasoning attached.
What the team starts with
Hire · start date and employment Roster CSV · hours and earnings medical-certification.pdf employer-leave-policy.docx WA PFML · WAC 192-500-185 STD-offsets.xlsx Employee · leave dates Manager · work schedule What did we know last Tuesday?
assemble facts
resolve gaps
apply rules
→
What LEAN returns
Riley · week of Feb 10
WA PFML medical
- Job protection
- Granted
- Wage replacement
- Denied
Why: Claim week is serving the waiting period. Hours are met and certification is on file.
Sources · hire · roster · certification · WAC
Product walkthrough
Open why. Ask what’s missing.
Navigator answers from the same determination the engine already computed. Each sentence can point at a citation. The timeline and the Why stay the source of truth.
Riley · WA PFML medical
Navigator
as of 2026-03-14
Why isn’t wage replacement covering Riley’s week of Feb 10? Job protection already looks granted.
Job protection is granted for that week. Wage replacement is denied because Riley is serving the program’s waiting period . Riley’s hours and certification are already satisfied .
WA does not pay benefits for hours claimed during the waiting period, and its ordinary weekly proration rule does not apply to that waiting-period week .
This is the same status explanation available from Engine’s timeline.
- Timeline See job protection, wage replacement, and benefits develop independently over time.
- Why Open the rule, facts, and cited source behind a granted, held, or denied period.
- Amount Inspect the wage history, exclusions, rates, and offsets behind weekly pay.
See it
See it. Open why. Ask what’s missing.
Hire, roster CSV, survey, or API. The engine applies the program. When a fact is missing, the case holds and Navigator can ask for it.
Survey when a fact is missing
Held means needs information. The survey asks for that fact. When it arrives, the engine runs again.
One decision, with a Why
Job protection, wage replacement, and benefits each get a status, a citation, and a record of what was known at the time.
Engine
Intake to timeline
Navigator answers questions. The engine computes the leave. Open cases, review determinations, and watch the timeline from one desk.
Watch Riley’s case move through intake, employee questions, HR review, and timeline.
Weekly entitlement
Audit the math, skip the spreadsheet
Open the weekly breakdown: wage history, lookback, rate tiers, and payer offsets. The same Why that explains status also explains amount.
Stacked PFML, STD, and employer top-up is one weekly result. Open why to see each line, not a cell in a shared workbook.
- Incomplete lookback If the wage window is short or a fact is missing, the week holds instead of inventing a rate.
- Zero earnings vs missing A sabbatical quarter with no pay is not the same as a quarter nobody loaded. The engine keeps them apart.
- Offsets, itemized State PFML, short-term disability, and employer-paid leave are calculated together and shown as separate lines.
LEAN computes gross entitlement. Paycheck withholdings stay in payroll.
Riley · week of Jan 5
$1,000 this week
open why · amount
-
STD pays $600 60% of weekly wage
-
State PFML adds $150 offset by STD already paid
-
PFML computed $750 before offset
-
Week straddles rate tiers $500 @ 100% + $500 @ 50%
-
Weekly wage $1,000 from lookback
-
Lookback extended past two leave quarters
-
$39,000 over 3 paid quarters
-
Sabbatical quarter excluded zero earnings — not missing
-
-
-
-
Employer tops up $250 to full weekly wage
Policy lifecycle
Policy changes should be testable
Draft the rule in language a policy expert can review, test it against saved cases, choose when it takes effect, and preserve the decisions made under earlier versions.
Draft a reviewable rule
Build structured rule clauses using the terms your statute or handbook already uses.
Test it with saved cases
Run reusable scenarios with expected outcomes before a policy change reaches live cases.
Approve when it takes effect
Save changes as a draft, put them through your review path, and set the effective date explicitly.
Replay what applied then
Return to an earlier date and see the facts and determination available at that time without replacing the recorded result.
The audit trail
Open why on any stretch of time
Job protection and wage replacement can take different paths on the same week. The Why shows which rule fired, which facts were used, and what is still missing.
Each determination keeps the policy source, the facts, and the date they were known. You do not reconstruct the week from email.
- Status has a rule Granted, denied, held, or provisional names the clause that produced it.
- What was met, skipped, or missing Hours can be met, a waiting week can be taken, and certification can still be missing.
- Lanes stay independent Job protection can be granted while wage replacement is denied for the waiting period.
The trail is written when the decision is made. Later facts do not rewrite what was known then.
Riley · week of Feb 10
Partial
open why · status
-
Claim week is serving the waiting period path taken
-
Program requires a 7-day waiting period
-
Leave start 2026-02-10
-
Claim week begins Sunday · 2026-02-08
-
-
-
Already satisfied for this stretch not what blocked pay
-
Hours threshold met
-
Medical certification on file
-
-
Job protection for the same week granted
Trust
The engine decides. Navigator explains.
Chat should not invent eligibility. The rules compute the leave. Navigator answers from that result.
Programs in the engine
FMLA, ADA, WA PFML, CO FAMLI, and CA SDI / PFL / CFRA / PDL. More programs are added as packs, not as a count of statutes.
Policy changes
Draft the rule, test it on saved cases, approve it, and set the effective date. Earlier decisions stay with the version that made them.
Where the fact came from
Each fact keeps its source, timestamp, and the window it was valid. Replay as-of without replacing the recorded result.
Who can see pay and medical
Role checks and server-side masking keep compensation and medical facts off screens that should not see them.
Determinations API
The same engine that draws the timeline can be called from another product. Surveys, Why, and the recorded result stay attached.
Bring us a leave your team had to reconstruct
We’ll model the decision, calculate the result, and show where each part came from.
No spam. We’ll reply with a calendar link.