Evidence and decision infrastructure

From a question to a recorded decision, with every source in view.

sy-leph gathers the evidence a decision depends on, keeps the source and date of each item, runs the analysis and records what was decided and why. Missing, stale and conflicting evidence stays visible.

Discuss your business need See the workflow

Workflow

One workflow, applied to different questions.

The steps stay the same. The sources, units and methods change with the question. Two examples follow: a procurement opportunity review and a portfolio monitoring question.

  1. 01Question or objective

    State the decision, its owner and deadline. The factors that matter follow from it, not from the data already at hand.

  2. 02Evidence

    Each observation keeps its source, publication date and retrieval date. Missing, stale and conflicting items are marked as such.

  3. 03Analysis

    The method, formula and assumptions are shown. Alternative explanations and unanswered points are recorded beside the result.

  4. 04Decision record

    What was decided, by whom, on which evidence, with open conditions, owners and a date for the next review.

Example 1: procurement opportunity review

Illustration with synthetic data. No real buyer, supplier or contract.

sy-leph / Opportunity review / Framework contract, laboratory consumablesIllustration: synthetic data

Should we bid for this framework contract, and for which lots?

Buyer: regional public hospital group (synthetic). Four lots, three-year term.

Decide by
9 October 2026
Submission
20 October 2026, 12:00 CET
Owner
Commercial director

Evidence

FactorObservationSourcePublishedRetrievedStatus
ScopeFour lots. Lots 2 and 3 match the current product range.Contract notice2 Sep 202624 Sep 2026Current
QualificationTurnover of at least EUR 2 million. Quality certification required for lot 4.Tender documents, section 42 Sep 202624 Sep 2026Current
Quantity, lot 3Notice: 12,000 units a year. Annex B: 10,000 units a year.Notice and annex B2 Sep 202624 Sep 2026Conflicting
Price referencePrevious award EUR 1.8 million over three years.Award notice14 Mar 202324 Sep 2026Stale
Input costsProducer prices for plastic products up 4.1 per cent year on year.Statistical office series15 Sep 202624 Sep 2026Current
Incumbent capacityUnknown. No source found.NoneNoneNoneMissing

Analysis

  • FitLots 2 and 3 meet the stated qualification criteria. Lot 4 requires a certification that is not held.
  • Estimated value, lots 2 and 3EUR 0.8 to 1.0 million over three years.Previous award × share of lots 2 and 3 (45 to 50 per cent) × price change since award (1.00 to 1.10)
  • Alternative explanationThe lot 3 quantity gap may reflect a revised annex. The later document governs once the buyer confirms it.
  • Not establishedIncumbent capacity. The price reference is more than two years old.

Decision record

Prepare a bid for lots 2 and 3. No bid for lot 4.

Commercial director, 25 September 2026, on evidence retrieved 24 September 2026.

  1. Confirm the lot 3 quantity with the buyer. Bid manager, due 2 October 2026.
  2. Refresh the price reference. Analyst, due 7 October 2026.

Final bid decision: 8 October 2026.

Example 2: portfolio monitoring

Illustration with synthetic data. No real portfolio, position or market reading.

sy-leph / Standing watch / Rate sensitivity, bond sleeveIllustration: synthetic data

Does the recent rise in inflation expectations require a shorter duration for the bond sleeve?

Limit: modified duration of 7.0 years at most. Watch started 3 September 2026, without any case attached.

Review
Weekly, and on each trigger
Units
Years, per cent, EUR
Owner
Portfolio manager

Evidence

FactorObservationSourcePublishedRetrievedStatus
Inflation expectationsFive-year market-implied inflation 2.3 per cent, up 0.2 points in four weeks.End-of-day market data23 Sep 202624 Sep 2026Current
Core inflation2.6 per cent year on year, August.Statistical office release17 Sep 202624 Sep 2026Current
Sleeve durationModified duration 6.8 years against a limit of 7.0.Portfolio record24 Sep 202624 Sep 2026Current
Wage growthNegotiated wages, second quarter.Quarterly survey release12 Aug 202624 Sep 2026Stale
Energy pricesNot connected to this watch.NoneNoneNoneMissing

Analysis

  • SensitivityA parallel rise of 0.50 points in yields implies a sleeve price change of about -3.4 per cent.-modified duration × yield change = -6.8 × 0.50 points. First order only; convexity and curve shape ignored.
  • Alternative explanationThe move may follow energy prices rather than wages. Energy evidence is missing and core inflation does not yet confirm a broad rise.
  • Not establishedThe driver of the move. Wage evidence is one quarter old.

Decision record

Hold duration at 6.8 years. Reduce to 6.0 years if five-year implied inflation closes above 2.5 per cent on two consecutive days.

Portfolio manager, 25 September 2026.

  1. Connect an energy price series to this watch. Data lead, due 2 October 2026.

Watch active. Next review after the inflation release of 16 October 2026.

Both records use the same structure. What differs is the evidence each question needs and the method that can be applied to it. The figures above are synthetic and show the form of the output only.

Asset Manager

Financial analysis you operate directly.

Asset Manager is the financial analysis application. Analysts choose an instrument or series, change an assumption, compare the result and save the analysis with its inputs and their dates.

In development. Each tool runs only where the required data is held; otherwise it names the missing input.

Technical / Equity A (synthetic), 1 dayIllustration: synthetic data
Close, EURSimple moving average, 50 sessions
Close 136.81 EURSMA 50 124.40 EURRSI 14 61.8Known by 24 Sep 2026 close

Technical charts

Price and volume for an instrument, with the controls an analyst expects.

  • Instrument search; close or candle chart with volume
  • Timeframes of 15 minutes, 1 hour, 4 hours and 1 day
  • SMA, EMA, Bollinger bands, RSI and MACD, each with editable parameters and its formula shown
  • Annotations; currency or unit beside every price; the date by which each value was known
Macro / Prices and wages (synthetic), monthlyIllustration: synthetic data

Index, first month shown (January 2024) = 100

Consumer pricesNegotiated wages
Consumer prices 106.1Negotiated wages 108.4Observation Aug 2026Available 17 Sep 2026Retrieved 24 Sep 2026

Macroeconomic comparison

Up to four public series on one chart, on a common basis when their units differ.

  • Six transformations: level, change, per cent change, change on a year earlier, index and standard score
  • Observation, availability and retrieval dates kept apart
  • Saved scenarios that record the series and transformations used
Options / Two strategies on Equity A (synthetic)Illustration: synthetic data

Profit or loss per share at expiry, EUR, against the underlying price

Strategy A, call spreadStrategy B, single call
Model output, strategy A, on your assumptions:Value 3.62 EURDelta 0.40Gamma 0.011Theta -0.010 EUR per dayVega 0.035 EUR per volatility point

Unavailable chain exploration and implied volatility: no option chain held for Equity A (synthetic). Payoffs, model values and realised volatility remain available.

Options payoff and Greeks

Two strategies compared on your own assumptions.

  • Payoff comparison of two strategies with editable legs
  • Black-Scholes values and Greeks on your own assumptions, labelled as model output
  • A realised volatility view of the underlying
  • Chain exploration and implied volatility where an option chain is held
Saved analysesIllustration: synthetic data
AnalysisInputs known byKey assumptionSaved
Call spread against single call, Equity A24 Sep 2026 closeVolatility 25 per cent24 Sep 2026
Call spread, higher volatility24 Sep 2026 closeVolatility 30 per cent24 Sep 2026
Prices and wages comparison17 Sep 2026Index, January 2024 = 10022 Sep 2026

Saved analyses

The analysis is kept with its inputs, assumptions and dates.

  • Save an analysis and reopen it later
  • Compare two saved analyses side by side
  • Attach an analysis to a case, or record a request for a new case

Applications

Where the workflow is applied today.

Opportunity reviewProcurement and commercial opportunities

Published opportunities screened against a stated objective. Each record shows its deadline, publisher, the evidence behind its relevance and the inputs still missing.

MonitoringStanding watches on a question or indicator

A watch starts from an objective, with or without a case. Changes that affect a decision are kept apart from routine source updates.

Financial analysisAsset Manager

Technical, macroeconomic and options analysis on the data held, with saved and comparable analyses.

Data explorationData Lab

Public statistical series with readable names, a link to the exact source series where the publisher provides one, comparison, transformations and CSV export.

Each application states the data it covers, the methods it supports and their limits. A new domain can require a new source, model or method before it is supported.

About

Two disciplines. One business question.

sy-leph brings together a mathematician and a lawyer: quantitative analysis alongside attention to rules, obligations and commercial context.

Contact

What decision is your company facing?

Tell us where the uncertainty sits. We will start there.

contact@sy-leph.com

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