Tell us what to change or add.
Open a decision below. Check the area, period, inputs, result and proposed next step.
Use Change example to try different values. Use Data needed to check the fields and sources. The land-use change decision has its own comparison views.
Record your corrections below, then download your answers or print them.
Compare matching purchase and sale quotations after stated costs and mass loss.
Validation required
Fictional default example · 2025.
What the selected record shows. Quoted net return per purchased kg: 10.9 LKR/kg.
Next step. Check matching product grades, quantities, losses and quote periods. Prepare quote comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A spread does not establish excess profit, market power or an actual realised return.
Quoted spread = sell−buy. Net scenario return per purchased kg = sell×(1−loss%/100)−buy−matching transfer costs.
Use matching grade, price date, currency, mass basis and payment terms. This quotation scenario excludes unlisted costs and is not realized profit or a forecast.
Other required records: Commodity; grade; market role; price; unit; date; transfer costs.
Calculation appendix
Review variation in comparable commodity-price observations.
Verified published formula · Sample coefficient of variation
What the selected record shows. Observed value: 104 LKR/kg.
Next step. Check the comparable series and the reason for its variation. Prepare variation report in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A short series does not forecast prices or establish market instability.
Display observations in dated order. Sample SD uses n−1; coefficient of variation = 100 × SD / positive mean.
Match definitions, methods, grade, location and reference basis. Gaps are not joined. Descriptive variation is not a forecast, causal effect or significant trend.
Other required records: Regular prices; commodity grade; market; observation dates; baseline; missingness.
National Institute of Standards and Technology United States · Dataplot Coefficient of VariationGovernment publication · Description, sample coefficient of variation and ratio-scale restrictions
Use a meaningful zero and positive mean. Local series selection and decision limits still need confirmation.
Review historical prices for the same commodity, grade and period basis.
Next step. Check source and period comparability before using the trend. Prepare trend report in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A few annual observations do not establish within-year seasonality or a forecast.
Other required records: Multi-year prices; season; market; grade; inflation basis; observation coverage.
Compare the spread of supplied matching price observations.
Next step. Check the observations, spread and coverage of the selected series. Prepare distribution report in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A small example distribution does not establish a representative market distribution.
Other required records: Commodity; grade; comparable price quotes; market; period; sample count.
Find missing and unknown price-reporting coverage.
What the selected record shows. 30 quotes are known to be uncovered; 5 have unknown coverage. 65% are confirmed covered.
Next step. Check the records behind the uncovered and unknown groups. Prepare coverage follow-up in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A quote count does not establish market representativeness or price quality.
100 × distinct covered eligible units / eligible frame. Known uncovered = frame − covered − unknown.
Count each eligible unit once for the selected service and period. Received messages, attendance, adoption and outcomes are separate measures.
Other required records: Market frame; commodity list; required quotes; valid quotes; collection dates.
Compare costs of the same specified rice, dhal and sugar basket.
What the selected record shows. 5 kg rice × 220 + 1 kg red dhal × 350 + 1 kg white sugar × 290 = 1740.00 LKR. The quantities and prices are labelled scenario assumptions.
Next step. Check matching product grades and price sources. Prepare cost comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
The fictional three-item basket is not an official cost-of-living measure.
Basket cost = rice kg × rice LKR/kg + red-dhal kg × red-dhal LKR/kg + white-sugar kg × white-sugar LKR/kg. Compare locations only for the same quantities, product specifications, currency and price period.
This is a fictional three-item basket with stated quantities. It is not an official consumer-price index, nutritional basket, current market quotation or household expenditure estimate.
Other required records: Basket composition; quantities; local prices; income benchmark; period; definitions.
Compare farm-enterprise gross margins under matching output and cost conventions.
Verified published formula · Enterprise gross margin
What the selected record shows. The supplied 4,500 kg at 110 LKR/kg gives 495,000 LKR revenue. After 360,000 LKR variable costs, gross margin is 135,000 LKR.
Next step. Review the prices, quantities and costs behind the margin. Prepare margin comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Gross margin excludes some fixed and opportunity costs and does not establish profit.
Gross margin = saleable output × realized price − variable costs. Divide by matching hectares for margin/ha; variable-cost break-even price = variable costs / output.
Keep fixed costs, family-labour opportunity cost, taxes and financing identifiable. Gross margin is not net profit. Crop, prices and costs are fictional coherent enterprise assumptions. Gross margin excludes fixed and financing costs; it is not household income or net profit.
Other required records: Crop revenue; variable costs; hectares; production system; sample weights.
Food and Agriculture Organization of the United Nations · Farm Management for Asia A Systems ApproachInstitution publication · Chapter 4, Gross margin and section 4.7.1
Per-hectare and variable-cost break-even outputs are algebraic rearrangements. Local costs, prices and interpretation still need confirmation.
Reconcile input mass with saleable output, by-products, transfers and stock.
What the selected record shows. Unaccounted physical share: 6.667 %.
Next step. Reconcile the input, output, stock and transfer records. Prepare loss-balance review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
An unaccounted balance does not establish where or why physical loss occurred.
Unaccounted = input − saleable output − usable by-products − closing stock − transfers out. Share =100 × unaccounted / input.
Use a consistent moisture basis and process boundary. Unaccounted mass is not automatically avoidable food loss or spoilage.
Other required records: Batch input; output; losses; quality degradation; stage; measurement protocol.
Compare connected-market quotations after stated transport costs and losses.
A price difference does not prove arbitrage feasibility or market inefficiency.
Other required records: Matched prices; transport costs; grade; trade flows; dates; restrictions.
Compare enterprise-income changes in the supplied treatment and comparison records.
Verified published formula · Difference-in-differences arithmetic
What the selected record shows. Treatment change: 170,000; comparison change: 70,000; difference in changes: 100,000 LKR/ha. This comparison alone does not establish causation or benefit.
Next step. Obtain the missing evidence listed below. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A difference in changes does not establish a causal policy effect.
(Treatment after−before) − (comparison after−before), using the same outcome definition and periods.
The arithmetic alone does not establish causation. Design, parallel trends, confounding, attrition, uncertainty and adverse effects need appropriate evidence.
Other required records: Policy exposure; baseline; follow-up; comparison group; prices; weather; confounders.
World Bank · Impact Evaluation in Practice Second EditionInstitution publication · Chapter 7, table 7.2, printed page 140, PDF page 170
The formula is verified. Causal interpretation still requires a defensible study design, comparison and assumptions.
Compare expenditure for the same specified input quantity and price basis.
What the selected record shows. Item expenditure: 10,500 LKR.
Next step. Review cost components and comparable verified outputs. Prepare cost comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
An expenditure change does not separate price, quantity and product-quality effects automatically.
Specified quantity × comparable unit price. Sum only non-overlapping items from the same basket specification, location and price period.
An absent or zero denominator has no unit-cost result. Keep fixed, variable and opportunity costs identifiable. Fictional same-grade urea prices are in LKR/kg. Quantity and unit price effects are kept separate; no current market price is implied.
Other required records: Input type; price; quantity; location; period; farm system.
Compare collective-marketing approaches using participation, governance and buyer evidence.
What the selected record shows. There is not enough information to choose this option. Obtain the records and evidence about conditions listed below. The supplied budget less cost is 300,000 LKR.
Next step. Obtain the missing records before choosing. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Cost alone does not establish collective readiness or a marketing benefit.
Compare each alternative's stated benefit, adverse effects, domain evidence and mandatory constraints. Where cost and budget are supplied, budget balance = budget − option cost. A budget balance alone does not determine domain feasibility or select an option.
Other required records: Organization evidence; participation; costs; sales outcomes; governance; research design.
Compare cash labour cost and total recorded effort per matching hectare.
What the selected record shows. Cash labour cost per hectare: 72,000 LKR/ha.
Next step. Check matching outputs, denominators and operating conditions. Prepare performance comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Unpaid family labour is effort and is not included as a cash wage payment.
Cash cost/ha = hired days×cash wage/area. Total effort/ha=(hired+unpaid family days)/area. Do not value unpaid labour as zero opportunity cost.
Other required records: Labour days; wages; crop; season; hectares; family and hired labour.
Compare reported supply observations with their matching reference values.
What the selected record shows. Difference: -10 kg.
Next step. Check the unusual observation and its comparison basis. Prepare investigation brief in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A difference needs source checks before identifying a shock or its cause.
Later/comparison value minus Comparable reference value. Relative change = 100 × difference / Comparable reference value when the earlier value is positive.
Other required records: Arrivals; prices; transport interruptions; crop output; event timing; baseline.
Compare storage cash-flow scenarios under the stated investment and discount assumptions.
Verified published formula · Discounted cash-flow NPV
What the selected record shows. At the supplied 8% annual discount assumption, the five-year cash flows and residual value give 109,847.353 LKR net present value after the initial investment. The figure compares cash flows under these assumptions.
Next step. Review the cash flows, discount assumptions and constraints. Prepare cash-flow comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Net present value does not establish avoided spoilage or investment suitability.
NPV = −initial investment + sum of year1…5 net cash flows discounted at the stated annual rate, including residual value once in year5.
Match currency, price year, real/nominal basis and cash-flow timing. The example rate and five-year horizon are assumptions, not institutional financing terms; no credit approval follows.
Other required records: Storage costs; losses; capacity; price seasonality; energy; shelf life.
Food and Agriculture Organization of the United Nations · Guidelines for defining financial economic environmental and social informationInstitution publication · Sections 2.2.2 and 2.2.3, discounting and Net Present Value
The five-year horizon, discount rate and cash assumptions are local settings. Verification does not approve an investment or loan.
Compare agrarian study designs using the research question, frame and variance evidence.
A low-cost option does not establish valid selection or causal identification.
Other required records: Target population; strata; expected variability; research question; cost; precision.
Compare conflicting market measurements with matching units, grades and periods.
What the selected record shows. Difference: -10 LKR/kg.
Next step. Reconcile the original records using their source references. Prepare source comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A difference does not identify which source should be corrected.
Later/comparison value minus Earlier/source value. Relative change = 100 × difference / Earlier/source value when the earlier value is positive.
Keep both originals, units, scope, method, calibration and correction history. A difference does not identify which source is correct; no automatic averaging or overwrite.
Other required records: Observation ID; independent quote; unit; grade; collection date; verification.
Find participants with a recorded capability gap who lack matching training.
What the selected record shows. 30 participants are known to be uncovered; 5 have unknown coverage. 65% are confirmed covered.
Attendance does not establish competence or the effect of training.
Count each eligible unit once for the selected service and period. Received messages, attendance, adoption and outcomes are separate measures. Training coverage is not verified adoption or a measured gain in capability.
Other required records: Needs assessment; participant frame; previous training; adoption; location.
Identify policy-analysis requests past their recorded decision-response date.
What the selected record shows. Open days past due: 29 days. Follow up overdue case.
Next step. Follow up overdue case; confirm the missing condition evidence. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A deadline does not determine policy importance or authorise a conclusion.
Open age = assessment date − received date. Days past due = max(0, assessment date − recorded due date) for open cases. Show documented critical conditions separately.
Example due dates are not legal service standards. Do not alter statutory deadlines by silently subtracting pauses, or infer severity from age alone.
Other required records: Request; question; responsible institution; evidence availability; due date; analyst capacity.
Check whether supplied inputs reproduce a stated agrarian-research result.
What the selected record shows. Difference: -10 LKR/ha. Investigate reproduction difference.
Next step. Investigate reproduction difference. Prepare reproduction-check note in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Arithmetic reproduction does not validate the research design or policy inference.
Reproduced minus expected result, within an explicitly supplied absolute tolerance, using the same exact input/method versions and a separate checker. Retain originals, code, parameters and environment evidence.
Other required records: Dataset edition; survey design; code; model; assumptions; result; reviewer.
Check which existing source fields can supply the decision inputs.
Existing form reference: 5ef25f806a9c3864
Existing form reference: 65fb55fc4bacaeb4
Existing form reference: 3d27791c0b26d5a7
Existing form reference: 362fe913ea87b4d5
Existing form reference: 4c6b93b0f4ec772d
Existing form reference: edf7d040b8bcbc45
Existing form reference: f462aa65988abf9a
Your institution has its own document and image library. Use the same library for reports, photos and other evidence.
Open this screen for HARTISee the presentation example
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Data structure keeps the existing source tree, records, charts and map. Manage structure adds a place to propose changes to definitions.
An entity type means a kind of thing or event, such as a reservoir or an inspection. Drafts stay in this browser. A demo approval does not change real definitions, data, chart links or sharing rights.
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We currently use public data and published reports where available. Please confirm whether your institution can provide data directly, so we can avoid retyping or reading figures from PDFs.
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