Sri Lanka decision proposal
Tell us what to change or add.
Archived decisions
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 recorded variety areas before discussing district extension support.
Validation required
Fictional default example · 2025.
What the selected record shows. Class area: 120 ha.
Next step. Check category definitions, coverage and the stated denominator. Prepare composition report in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Area shares do not establish farmers' preferences or recommended varieties.
Category share = 100 × category amount / total compatible category amounts. HHI = sum of squared fractional shares, displayed on a 0–1 scale.
Categories must be mutually exclusive and cover the stated frame. Do not mix values, quantities, plots or hectares, or treat an HHI competition threshold as an institutional policy.
Other required records: District; variety; sown hectares; season; survey coverage.
Calculation appendix
Identify eligible rainfed and irrigated farms with no confirmed support.
What the selected record shows. 30 farms 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.
Coverage alone does not determine the support each farm needs.
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: Farm; irrigation class; cultivated hectares; drought exposure; eligibility frame.
Compare matching farm-cost components and cultivated hectares.
What the selected record shows. The supplied costs total 497,000 LKR for 5.4 ha. Cost per matching unit is 92,037.037 LKR/ha.
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.
High cost alone does not establish its cause or the best intervention.
Sum non-overlapping costs, then divide by the matching verified quantity for the same currency and accounting period.
An absent or zero denominator has no unit-cost result. Keep fixed, variable and opportunity costs identifiable.
Other required records: Crop; district; input costs LKR; hectares; season; production system.
Check extension task windows against planting progress and available staff.
What the selected record shows. Planned duration: 3 days. Resolve overlapping resource bookings.
Next step. Resolve overlapping resource bookings. Prepare schedule review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A timetable does not confirm attendance or assign staff.
Check start/end order, operating window, effort, predecessor completion and overlapping bookings for the same resource. A conflict is flagged; no optimal schedule is invented.
Other required records: Crop calendar; planned dates; actual sowing dates; locations; officer capacity.
Compare accepted crop output with its stated target.
What the selected record shows. Difference: -10 kg.
Next step. Check the matching records and reasons for the difference. Prepare difference review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A shortfall does not establish its cause or whether the target was appropriate.
Observed value minus Planned value. Relative change = 100 × difference / Planned value when the earlier value is positive.
Other required records: Crop; provincial target; actual output; reporting period; target version.
Check pest observations and diagnostic evidence before planning visits.
What the selected record shows. The required evidence is incomplete for this pest response case. The items below identify what must be obtained or reconciled.
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 checklist does not diagnose a pest or determine treatment urgency.
Check each required item and retain its reference. A documented item is not a scientific, legal or institutional approval.
Show the hazard, exposure and verified controls separately. No generic score, probability, diagnosis, site clearance or official warning is derived from a count.
Other required records: Pest reports; verified incidence; crop stage; affected fields; expert criteria.
Compare extension workload with usable staff hours.
What the selected record shows. Usable capacity minus demand: -15 staff hours. Review capacity shortfall.
Next step. Review capacity shortfall. Prepare capacity review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A gap does not establish staff skills, deployment authority or travel feasibility.
Usable capacity = rated capacity − documented unavailable capacity. Surplus/shortfall = usable − matching demand.
Match peak/average basis, time window, skill, staffing, accessibility and other binding constraints. One aggregate capacity does not override a safety constraint.
Other required records: Farmer requests; handling hours; officer availability; travel; service areas.
Compare valid seed stock and commitments with the stated seasonal demand.
What the selected record shows. Uncommitted usable stock: 310 kg seed. Review replenishment gap.
Next step. Review replenishment gap. Prepare stock review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Stock must match the crop, quality and required delivery window.
Usable = physical−quarantined−expired (non-overlapping groups). Available = usable−commitments. Additional gap = max(0, new demand−available).
Stock must be compatible by item, lot, condition, expiry and delivery window. Do not allocate quarantined/expired stock or silently erase overcommitment.
Other required records: Variety; seed stock kg; commitments; requested kg; lead time; expiry.
Identify farms whose required soil-sampling coverage is missing or unknown.
Coverage does not establish a fertiliser requirement.
Other required records: Farm frame; recent soil tests; crops; sampling capacity; geographic coverage.
Check site comparability before a technology demonstration is selected.
What the selected record shows. The required evidence is incomplete for this demonstration farms case. The items below identify what must be obtained or reconciled.
A complete checklist is not evidence of equal experimental conditions.
Evidence completeness alone cannot establish suitability, eligibility, safety, permission or method validity.
Other required records: Candidate farms; soil; crop; water; farmer consent; trial objectives.
Check the stages from training participation to verified adoption.
What the selected record shows. Verified completion share: 53.333 %.
Next step. Check the original cases that have not reached a verified outcome. Prepare progress follow-up in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Participation or training completion is not verified practice adoption.
100 × verified completed members / original unique cohort. Keep unknown follow-up separate; stages are nested, not independent populations.
Attendance, receipt, adoption, delivered service and outcomes are distinct stages. Repeated visits must not become new people. The original cohort and nested review/completion stages must match; an uncompleted record is not automatically overdue. Unknown follow-up is a subset, not an extra stage.
Other required records: Training cohort; attendance; assessment; practice adoption; follow-up date.
Check crop-loss claim and inspection evidence before verification.
What the selected record shows. The required evidence is incomplete for this crop damage case. The items below identify what must be obtained or reconciled.
Claimed area and reported loss are not verified damage.
Other required records: Incident; crop; affected hectares; weather; field evidence; claim date.
Compare machinery-service demand with usable machine hours.
What the selected record shows. Usable capacity minus demand: -15 machine hours. Review capacity shortfall.
Capacity alone does not establish access, operator competence or booking permission.
Other required records: Farm demand; machines; capacity hours; locations; road access; crop calendar.
Compare matching crop output and irrigation water on equivalent farms.
What the selected record shows. Saleable crop output: 19,780 kg; Matching irrigation water input: 7,200 m³. This gives 2.747 kg/m³.
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.
Ratios alone do not identify which management practice caused a difference.
Saleable crop output / Matching irrigation water input, for the same product, process and period.
Other required records: Crop output; water input; practice; soil; season; controlled trial evidence.
Compare alternative crop programmes using suitability, water, livelihoods and resources.
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.
A budget comparison does not establish a viable crop programme.
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: Crop suitability; gross margins; demand; water; labour; programme cost.
Reconcile post-harvest input, saleable output, by-products 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.
Unaccounted quantities need source checks before a loss-reduction intervention.
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 weights; losses; cold storage access; handling methods; market distance.
Reconcile programme funding need, commitments, receipts and expenditure.
What the selected record shows. Unfunded need: 850,000 LKR. Review unfunded need.
Next step. Review unfunded need. Prepare funding review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A funding balance does not verify delivery of the activities.
Unfunded = need − commitments. Undisbursed = commitments − disbursements. Unspent = disbursements − eligible spending.
Keep commitments, cash receipts, expenditure and verified physical outputs separate. Negative balances flag overcommitment or reconciliation; no automatic accounting adjustment.
Other required records: Approved budget; commitments; disbursements; expenditure; verified outputs.
Identify eligible smallholder groups with no confirmed support or unknown follow-up.
Coverage does not establish vulnerability, entitlement or informed consent.
Other required records: Eligible farmers; service participation; consented group attributes; location; period.
Compare district crop returns using matching definitions, units and periods.
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 numerical difference does not identify which return is correct.
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: District return; crop code; unit; season; revised record; source custodian.
Compare agricultural programme outcomes using matching treatment and comparison records.
Verified published formula · Difference-in-differences arithmetic
What the selected record shows. Treatment change: 17; comparison change: 7; difference in changes: 10 kg/ha. This comparison alone does not establish causation or benefit.
A descriptive difference does not establish programme impact.
(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: Programme cohort; baseline outcomes; follow-up; comparison areas; weather; prices.
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.
Source. Sri Lanka publication.
Data needed. District and season, irrigation class, crop-cut yield estimate and a published comparable benchmark.
Method. Compare district paddy yields within the same season and irrigation class. Rank verified yield gaps after excluding incompatible groups.
Worked example. Compare two Yala paddy yields from the same irrigation class. If the district yields 3.6 t/ha against a comparable 4.1 t/ha, investigate the 0.5 t/ha gap before choosing an intervention.
Next step. Ask extension officers to investigate the largest comparable gaps and document their causes.
Lakmali, Gunawardena and Dayawansa, University of Peradeniya. Table 4, printed p. 347, paddy yield by irrigation management group.
Confirm the benchmark population, rainfall and uncertainty before assigning an intervention.
Check which existing source fields can supply the decision inputs.
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Open this screen for Provincial Departments of AgricultureSee the presentation example
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