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    shiftweave

    Explainable workforce scheduling and minimal-disruption repair engine

    scheduling
    constraint-solving
    roster
    optimization
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    Author
    Version
    0.1.1
    License
    Apache-2.0
    Repository
    Last updated
    2 months ago
    Downloads
    35

    No dependencies

    #ShiftWeave

    ShiftWeave is an explainable workforce scheduling and minimal-disruption repair engine written in MoonBit. It assigns qualified and available people to shift slots, validates hard constraints, scores fairness and preferences, explains infeasible rosters, and repairs an existing roster after leave or demand changes.

    The repository contains more than 4,000 lines of effective MoonBit source, runnable scenarios, tests, CI, and an independently verifiable reporting pipeline.

    #Why ShiftWeave

    Small teams often schedule with spreadsheets. A spreadsheet can display a roster, but it rarely explains why a shift cannot be filled or how to repair a roster without changing everyone else's assignment. ShiftWeave treats scheduling as a constrained search problem and keeps evidence for every rejection.

    The project is deliberately domain-facing rather than a MoonBit language tool. Typical uses include retail shifts, laboratory equipment duty, volunteer events, and small service teams.

    #Quick start

    moon run cmd/main -- demo
moon test

    The demo solves a seven-shift retail roster and prints two Markdown reports: the assignment result and an operational risk review. The latter identifies uncovered duties, replacement margin, rest-sensitive handovers, and concrete follow-up actions.

    The current CLI intentionally exposes the built-in demonstration only; the reusable library API provides solving, repair, parsing, and reporting. examples/store.roster demonstrates the interchange format and can be parsed through parse_roster when embedded in an application.

    #Install and use as a library

    moon add SUIKKKA/shiftweave@0.1.1

    let problem = @shiftweave.store_scenario()
    let result = @shiftweave.solve(problem)
    println(@shiftweave.render_markdown(problem, result))

    For a disrupted roster, construct a RepairRequest and call repair. Search uses one deterministic global node budget; ScheduleResult reports the real explored-node and propagated-value counts and distinguishes an exhausted budget from a proven infeasible problem.

    #Core capabilities

    • Validates identities, time spans, availability, skills, slots, overlap, rest, workload, and consecutive-duty limits.
    • Propagates forced assignments before deterministic bounded backtracking.
    • Scores coverage, fairness, preferences, and disruption separately.
    • Repairs an existing roster while preserving unaffected locked assignments.
    • Explains candidate rejection and suggests changes for infeasible slots.
    • Produces Markdown, CSV, and JSON output plus stable audit fingerprints.
    • Reviews daily load, shift resilience, standby margin, and handover risk.
    • Includes retail, laboratory, and volunteer-event scenarios.

    #Architecture

    The domain model is independent from the solver. validation.mbt and policy.mbt form the verification boundary; candidate.mbt, propagation.mbt, and solver.mbt implement search; scoring.mbt keeps optimization policy explicit; repair.mbt handles minimal-change replanning. Reporting and operational review consume only public problem/result values, so their evidence can be checked independently.

    The text interchange format is line-oriented and pipe-delimited. Comments begin with #; records describe settings, people, skills, availability, preferences, shifts, requirements, and existing assignments. See examples/store.roster for a compact example and text_input.mbt for the parser and round-trip serializer.

    #Testing and reproducibility

    moon fmt --check
moon check --deny-warn
moon test --deny-warn
moon build
moon run cmd/main -- demo
moon publish --dry-run

    Tests cover validation failures, deterministic solving, policy evaluation, candidate explanations, repair impact, serializers, built-in scenarios, audit comparison, and operational risk. GitHub Actions runs formatting, checking, the native test suite, and the demo on every push and pull request.

    #Development

    moon check
moon test
moon fmt

    #Project boundaries and originality

    • Offline core and CLI; no cloud account or attendance tracking.
    • Configurable work/rest rules; no jurisdiction-specific legal advice.
    • Deterministic results for the same input and search budget.
    • A verifier checks every emitted roster independently of the solver.

    ShiftWeave is an original project implemented for this hackathon. It does not port third-party source code. Dependencies are limited to the MoonBit core/toolchain; repository contents are released under Apache-2.0. AI assistance and source provenance are documented in PROVENANCE.md.

    #License

    Apache-2.0. See LICENSE.

    PersonId

    source
    type PersonId = String

    ShiftId

    source
    type ShiftId = String

    Assignment

    source
    pub(all) struct Assignment {
      shift_id : String
      slot : Int
      person_id : String
      locked : Bool
    } derive(Eq, 
    Debug    )

    AuditSummary

    source
    pub(all) struct AuditSummary {
      valid_problem : Bool
      complete : Bool
      hard_errors : Int
      warnings : Int
      coverage_percent : Int
      deterministic_fingerprint : String
      notes : Array[String]
    } derive(Eq, 
    Debug    )

    CandidateDomain

    source
    pub(all) struct CandidateDomain {
      key : SlotKey
      people : Array[String]
      rejected : Array[Diagnostic]
    } derive(Eq, 
    Debug    )

    CandidateExplanation

    source
    pub(all) struct CandidateExplanation {
      person_id : String
      eligible : Bool
      incremental_cost : Int
      reasons : Array[String]
    } derive(Eq, 
    Debug    )

    CoverageSummary

    source
    pub(all) struct CoverageSummary {
      total_slots : Int
      covered_slots : Int
      uncovered_slots : Int
      coverage_percent : Int
      people_used : Int
      total_minutes : Int
    } derive(Eq, 
    Debug    )

    DayOperation

    source
    pub(all) struct DayOperation {
      day : Int
      shift_count : Int
      required_slots : Int
      assigned_slots : Int
      uncovered_slots : Int
      people_used : Int
      scheduled_minutes : Int
      average_load : Int
      risk_score : Int
    } derive(Eq, 
    Debug    )

    Day-level summary for dashboards and post-run review.

    Diagnostic

    source
    pub(all) struct Diagnostic {
      code : DiagnosticCode
      message : String
      person_id : String?
      shift_id : String?
      slot : Int?
      severity : Int
    } derive(Eq, 
    Debug    )

    DiagnosticCode

    source
    pub(all) enum DiagnosticCode {
      InvalidTimeSpan
      DuplicatePerson
      DuplicateShift
      UnknownPerson
      UnknownShift
      InvalidSlot
      DuplicateAssignment
      OverlappingAssignment
      OutsideAvailability
      SkillMismatch
      MaximumMinutesExceeded
      InsufficientRest
      ConsecutiveLimitExceeded
      UncoveredSlot
      EmptyCandidateDomain
      SearchBudgetExceeded
      InvalidConfiguration
    } derive(Eq, 
    Debug    )

    FindingLevel

    source
    pub(all) enum FindingLevel {
      Info
      Warning
      Error
    } derive(Eq, 
    Debug    )

    Handover

    source
    pub(all) struct Handover {
      person_id : String
      from_shift : String
      to_shift : String
      gap_minutes : Int
      same_group : Bool
      risk_score : Int
    } derive(Eq, 
    Debug    )

    A transition between two adjacent duties performed by one person.

    OperationalAction

    source
    pub(all) struct OperationalAction {
      priority : Int
      category : String
      subject : String
      message : String
    } derive(Eq, 
    Debug    )

    A concrete operational action generated from schedule evidence.

    OperationalReview

    source
    pub(all) struct OperationalReview {
      shifts : Array[ShiftOperation]
      days : Array[DayOperation]
      handovers : Array[Handover]
      actions : Array[OperationalAction]
      total_risk : Int
    } derive(Eq, 
    Debug    )

    Full operational view; it remains useful even for a partial roster.

    ParseIssue

    source
    pub(all) struct ParseIssue {
      line : Int
      column : Int
      message : String
      source : String
    } derive(Eq, 
    Debug    )

    ParsedRoster

    source
    pub(all) struct ParsedRoster {
      problem : ScheduleProblem
      issues : Array[ParseIssue]
    } derive(Eq, 
    Debug    )

    Person

    source
    pub(all) struct Person {
      id : String
      name : String
      skills : Array[Skill]
      availability : Array[TimeSpan]
      preferences : Array[ShiftPreference]
      target_minutes : Int
      maximum_minutes : Int
      maximum_consecutive_shifts : Int
    } derive(Eq, 
    Debug    )

    PersonWorkload

    source
    pub(all) struct PersonWorkload {
      person_id : String
      assigned_minutes : Int
      target_minutes : Int
      difference : Int
      assignment_count : Int
      preference_score : Int
    } derive(Eq, 
    Debug    )

    PolicyFinding

    source
    pub(all) struct PolicyFinding {
      rule : String
      level : FindingLevel
      message : String
      person_id : String?
      shift_id : String?
      measured : Int
      expected : Int
    } derive(Eq, 
    Debug    )

    PropagationResult

    source
    pub(all) struct PropagationResult {
      assignments : Array[Assignment]
      diagnostics : Array[Diagnostic]
      forced_count : Int
      feasible : Bool
    } derive(Eq, 
    Debug    )

    RecordKind

    source
    pub(all) enum RecordKind {
      PersonRecord
      SkillRecord
      AvailabilityRecord
      PreferenceRecord
      ShiftRecord
      RequirementRecord
      AssignmentRecord
      RuleRecord
      CommentRecord
      BlankRecord
      UnknownRecord
    } derive(Eq, 
    Debug    )

    RepairRequest

    source
    pub(all) struct RepairRequest {
      unavailable_people : Array[String]
      removed_shifts : Array[String]
      unlocked_shifts : Array[String]
      preserve_unaffected : Bool
    } derive(Eq, 
    Debug    )

    RepairRequest::empty

    source

    ScheduleMetrics

    source
    pub(all) struct ScheduleMetrics {
      hard_violations : Int
      uncovered_slots : Int
      preference_score : Int
      fairness_penalty : Int
      disruption_count : Int
      total_minutes : Int
      objective : Int
    } derive(Eq, 
    Debug    )

    ScheduleMetrics::empty

    source

    ScheduleProblem

    source
    pub(all) struct ScheduleProblem {
      people : Array[Person]
      shifts : Array[Shift]
      existing : Array[Assignment]
      minimum_rest_minutes : Int
      fairness_weight : Int
      preference_weight : Int
      disruption_weight : Int
    } derive(Eq, 
    Debug    )

    ScheduleResult

    source
    pub(all) struct ScheduleResult {
      status : SolveStatus
      assignments : Array[Assignment]
      diagnostics : Array[Diagnostic]
      metrics : ScheduleMetrics
      explored_nodes : Int
      propagated_values : Int
    } derive(Eq, 
    Debug    )

    SearchOptions

    source
    pub(all) struct SearchOptions {
      maximum_nodes : Int
      maximum_solutions : Int
      stop_at_first_feasible : Bool
      keep_explanations : Bool
    } derive(Eq, 
    Debug    )

    SearchOptions::default

    source
    fn SearchOptions::default() -> SearchOptions

    Shift

    source
    pub(all) struct Shift {
      id : String
      label : String
      time : TimeSpan
      required_people : Int
      requirements : Array[SkillRequirement]
      priority : Int
      group : String
    } derive(Eq, 
    Debug    )

    ShiftOperation

    source
    pub(all) struct ShiftOperation {
      shift_id : String
      label : String
      group : String
      assigned : Int
      required : Int
      qualified : Int
      standby : Int
      coverage_percent : Int
      risk_score : Int
      risk_level : String
    } derive(Eq, 
    Debug    )

    Operational analysis derived independently from the search algorithm.

    ShiftPreference

    source
    pub(all) struct ShiftPreference {
      shift_id : String
      weight : Int
    } derive(Eq, 
    Debug    )

    Skill

    source
    pub(all) struct Skill {
      name : String
      level : Int
    } derive(Eq, 
    Debug    )

    SkillRequirement

    source
    pub(all) struct SkillRequirement {
      skill : String
      minimum_level : Int
    } derive(Eq, 
    Debug    )

    SlotExplanation

    source
    pub(all) struct SlotExplanation {
      shift_id : String
      slot : Int
      candidates : Array[CandidateExplanation]
      eligible_count : Int
      rejected_count : Int
      forced : Bool
    } derive(Eq, 
    Debug    )

    SlotKey

    source
    pub(all) struct SlotKey {
      shift_id : String
      slot : Int
    } derive(Eq, 
    Debug    )

    SolveStatus

    source
    pub(all) enum SolveStatus {
      Solved
      Partial
      Infeasible
      BudgetExceeded
    } derive(Eq, 
    Debug    )

    TimeSpan

    source
    pub(all) struct TimeSpan {
      start : Int
      end : Int
    } derive(Eq, 
    Debug    )

    TimeSpan::contains

    source
    fn TimeSpan::contains(self : TimeSpan, other : TimeSpan) -> Bool

    TimeSpan::duration

    source
    fn TimeSpan::duration(self : TimeSpan) -> Int

    TimeSpan::gap_to

    source
    fn TimeSpan::gap_to(self : TimeSpan, other : TimeSpan) -> Int

    TimeSpan::is_valid

    source
    fn TimeSpan::is_valid(self : TimeSpan) -> Bool

    TimeSpan::overlaps

    source
    fn TimeSpan::overlaps(self : TimeSpan, other : TimeSpan) -> Bool

    absolute

    source
    fn absolute(value : Int) -> Int

    all_workloads

    source
    fn all_workloads(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PersonWorkload]

    analyze_days

    source
    fn analyze_days(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[DayOperation]

    Generate summaries only for days that contain at least one shift.

    analyze_handovers

    source
    fn analyze_handovers(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[Handover]

    Analyze every adjacent duty transition.

    analyze_shift_operations

    source
    fn analyze_shift_operations(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[ShiftOperation]

    Analyze every shift, including uncovered ones.

    apply_repair_request

    source
    fn apply_repair_request(problem : ScheduleProblem, request : RepairRequest) -> ScheduleProblem

    assigned_minutes

    source
    fn assigned_minutes(problem : ScheduleProblem, assignments : Array[Assignment], person_id : String) -> Int

    assignments_for_person

    source
    fn assignments_for_person(assignments : Array[Assignment], person_id : String) -> Array[Assignment]

    assignments_for_shift

    source
    fn assignments_for_shift(assignments : Array[Assignment], shift_id : String) -> Array[Assignment]

    audit_schedule

    source
    fn audit_schedule(problem : ScheduleProblem, assignments : Array[Assignment]) -> AuditSummary

    average_minutes

    source
    fn average_minutes(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    better_metrics

    source
    fn better_metrics(a : ScheduleMetrics, b : ScheduleMetrics) -> Bool

    build_domain

    source
    fn build_domain(problem : ScheduleProblem, assignments : Array[Assignment], shift : Shift, slot : Int) -> CandidateDomain

    build_domains

    source
    fn build_domains(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[CandidateDomain]

    build_operational_actions

    source
    fn build_operational_actions(shifts : Array[ShiftOperation], handovers : Array[Handover]) -> Array[OperationalAction]

    Turn evidence into a short, deterministic action queue.

    busiest_person

    source
    fn busiest_person(problem : ScheduleProblem, assignments : Array[Assignment]) -> String?

    can_assign

    source
    fn can_assign(problem : ScheduleProblem, assignments : Array[Assignment], shift : Shift, slot : Int, person : Person) -> Diagnostic?

    changed_assignments

    source
    fn changed_assignments(before : Array[Assignment], after : Array[Assignment]) -> Array[Assignment]

    check_availability_policy

    source
    fn check_availability_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_availability_supply_policy

    source
    fn check_availability_supply_policy(problem : ScheduleProblem) -> Array[PolicyFinding]

    check_capacity_policy

    source
    fn check_capacity_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_coverage_policy

    source
    fn check_coverage_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_duplicate_person_in_shift_policy

    source
    fn check_duplicate_person_in_shift_policy(assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_duplicate_slot_policy

    source
    fn check_duplicate_slot_policy(assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_empty_skill_policy

    source
    fn check_empty_skill_policy(problem : ScheduleProblem) -> Array[PolicyFinding]

    check_fairness_gap_policy

    source
    fn check_fairness_gap_policy(problem : ScheduleProblem, assignments : Array[Assignment], maximum_gap? : Int) -> Array[PolicyFinding]

    check_locked_assignment_policy

    source
    fn check_locked_assignment_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_maximum_minutes_policy

    source
    fn check_maximum_minutes_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_overlap_policy

    source
    fn check_overlap_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_preference_policy

    source
    fn check_preference_policy(problem : ScheduleProblem, assignments : Array[Assignment], threshold? : Int) -> Array[PolicyFinding]

    check_priority_policy

    source
    fn check_priority_policy(problem : ScheduleProblem, assignments : Array[Assignment], minimum_priority? : Int) -> Array[PolicyFinding]

    check_rest_policy

    source
    fn check_rest_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_skill_policy

    source
    fn check_skill_policy(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    check_target_minutes_policy

    source
    fn check_target_minutes_policy(problem : ScheduleProblem, assignments : Array[Assignment], tolerance? : Int) -> Array[PolicyFinding]

    compare_schedules

    source
    fn compare_schedules(problem : ScheduleProblem, left : Array[Assignment], right : Array[Assignment]) -> String

    count_policy_errors

    source
    fn count_policy_errors(findings : Array[PolicyFinding]) -> Int

    count_policy_warnings

    source
    fn count_policy_warnings(findings : Array[PolicyFinding]) -> Int

    count_uncovered

    source
    fn count_uncovered(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    coverage_summary

    source
    fn coverage_summary(problem : ScheduleProblem, assignments : Array[Assignment]) -> CoverageSummary

    disruption_count

    source
    fn disruption_count(existing : Array[Assignment], proposed : Array[Assignment]) -> Int

    domain_contains

    source
    fn domain_contains(domain : CandidateDomain, person_id : String) -> Bool

    evaluate_schedule

    source
    fn evaluate_schedule(problem : ScheduleProblem, assignments : Array[Assignment]) -> ScheduleMetrics

    expand_days

    source
    fn expand_days(base : ScheduleProblem, copies : Int) -> ScheduleProblem

    explain_candidate

    source
    fn explain_candidate(problem : ScheduleProblem, assignments : Array[Assignment], shift : Shift, slot : Int, person : Person) -> CandidateExplanation

    explain_problem

    source
    fn explain_problem(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[SlotExplanation]

    explain_slot

    source
    fn explain_slot(problem : ScheduleProblem, assignments : Array[Assignment], shift : Shift, slot : Int) -> SlotExplanation

    fairness_penalty

    source
    fn fairness_penalty(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    find_person

    source
    fn find_person(problem : ScheduleProblem, id : String) -> Person?

    find_shift

    source
    fn find_shift(problem : ScheduleProblem, id : String) -> Shift?

    forced_slots

    source
    fn forced_slots(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[SlotExplanation]

    has_errors

    source
    fn has_errors(diagnostics : Array[Diagnostic]) -> Bool

    impossible_slots

    source
    fn impossible_slots(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[SlotExplanation]

    incremental_cost

    source
    fn incremental_cost(problem : ScheduleProblem, assignments : Array[Assignment], shift : Shift, person : Person) -> Int

    is_available

    source
    fn is_available(person : Person, shift : Shift) -> Bool

    laboratory_scenario

    source
    fn laboratory_scenario() -> ScheduleProblem

    make_person

    source
    fn make_person(id : String, name : String, skills : Array[Skill], availability : Array[TimeSpan], target : Int, maximum : Int, preferences? : Array[ShiftPreference]) -> Person

    make_shift

    source
    fn make_shift(id : String, label : String, start : Int, end : Int, required : Int, requirements : Array[SkillRequirement], priority? : Int, group? : String) -> Shift

    maximum_workload_gap

    source
    fn maximum_workload_gap(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    meets_requirements

    source
    fn meets_requirements(person : Person, shift : Shift) -> Bool

    minutes_to_clock

    source
    fn minutes_to_clock(minutes : Int) -> String

    most_constrained_slot

    source
    fn most_constrained_slot(problem : ScheduleProblem, assignments : Array[Assignment]) -> SlotExplanation?

    parse_integer

    source
    fn parse_integer(text : String) -> Int?

    parse_roster

    source
    fn parse_roster(text : String) -> ParsedRoster

    person_minutes

    source
    fn person_minutes(problem : ScheduleProblem, assignments : Array[Assignment], person_id : String) -> Int

    preference_for

    source
    fn preference_for(person : Person, shift_id : String) -> Int

    preference_score

    source
    fn preference_score(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    propagate

    source
    fn propagate(problem : ScheduleProblem, initial : Array[Assignment]) -> PropagationResult

    record_kind

    source
    fn record_kind(line : String) -> RecordKind

    removed_assignments

    source
    fn removed_assignments(before : Array[Assignment], after : Array[Assignment]) -> Array[Assignment]

    render_csv

    source
    fn render_csv(problem : ScheduleProblem, result : ScheduleResult) -> String

    render_json

    source
    fn render_json(_problem : ScheduleProblem, result : ScheduleResult) -> String

    render_markdown

    source
    fn render_markdown(problem : ScheduleProblem, result : ScheduleResult) -> String

    render_operations_markdown

    source
    fn render_operations_markdown(review : OperationalReview) -> String

    Render a compact Markdown operations section.

    render_problem_explanation

    source
    fn render_problem_explanation(problem : ScheduleProblem, assignments : Array[Assignment]) -> String

    render_roster

    source
    fn render_roster(problem : ScheduleProblem) -> String

    render_slot_explanation

    source
    fn render_slot_explanation(problem : ScheduleProblem, explanation : SlotExplanation) -> String

    repair

    source
    fn repair(problem : ScheduleProblem, request : RepairRequest, options? : SearchOptions) -> ScheduleResult

    review_operations

    source
    fn review_operations(problem : ScheduleProblem, assignments : Array[Assignment]) -> OperationalReview

    Build the full operational review in one call.

    risk_level

    source
    fn risk_level(score : Int) -> String

    Convert a numeric risk into a stable label for reports.

    run_all_policies

    source
    fn run_all_policies(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[PolicyFinding]

    same_assignment

    source
    fn same_assignment(a : Assignment, b : Assignment) -> Bool

    same_day

    source
    fn same_day(a : TimeSpan, b : TimeSpan) -> Bool

    scenario_by_name

    source
    fn scenario_by_name(name : String) -> ScheduleProblem?

    scenario_names

    source
    fn scenario_names() -> Array[String]

    schedule_fingerprint

    source
    fn schedule_fingerprint(assignments : Array[Assignment]) -> String

    skill_level

    source
    fn skill_level(person : Person, name : String) -> Int

    smallest_domain_index

    source
    fn smallest_domain_index(domains : Array[CandidateDomain]) -> Int

    solve

    source
    fn solve(problem : ScheduleProblem, options? : SearchOptions) -> ScheduleResult

    split_fields

    source
    fn split_fields(line : String) -> Array[String]

    store_scenario

    source
    fn store_scenario() -> ScheduleProblem

    suggested_actions

    source
    fn suggested_actions(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[String]

    summarize_infeasibility

    source
    fn summarize_infeasibility(problem : ScheduleProblem, assignments : Array[Assignment]) -> Array[String]

    total_scheduled_minutes

    source
    fn total_scheduled_minutes(problem : ScheduleProblem, assignments : Array[Assignment]) -> Int

    trim_ascii

    source
    fn trim_ascii(text : String) -> String

    validate_assignments

    source
    fn validate_assignments(problem : ScheduleProblem, assignments : Array[Assignment], require_complete? : Bool) -> Array[Diagnostic]

    validate_problem

    source
    fn validate_problem(problem : ScheduleProblem) -> Array[Diagnostic]

    volunteer_scenario

    source
    fn volunteer_scenario() -> ScheduleProblem

    workload_for

    source
    fn workload_for(problem : ScheduleProblem, assignments : Array[Assignment], person : Person) -> PersonWorkload

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