Random Cinema Program Runtime Generator

Description

Sample supplied feature/trailer records, draw configured breaks between features, and return a relative-minute timeline plus delegated totals and mean-based trailer estimate. Trailers run once before the first feature; list sums and mean-times-count estimates remain separate full-precision values, and this is not venue scheduling or a clock/time-zone service.

A workflow or scheduling fixture makes ordering, dependencies, capacity, and timing explicit. Returning both the constructed records and their checks helps consumers distinguish a valid arrangement from a simulated failure case.

When to use this tool

Use this generator to create reproducible cinema program runtime cases from the supplied model or bank. Inspect the returned evidence before using cases in a test or exercise.

How to use the tool and how it works

Supply features, trailers, featureCount, trailerCount, withoutReplacement, breakMinutes in the field shapes below. Set seed when you need an explicit replay.
Run the tool and correct any input error. For generated controls, distinguish a successful fixture containing an invalid case from failure to generate the fixture.
Read features, trailers, breaks, timeline, featureMinutes, trailerMinutes, meanTrailerMinutes, estimatedTrailerMinutes, intermissionMinutes, programMinutes, timelineEndMinute. Use the conventions below. Keep answer-bearing fields separate when presenting an exercise.

Sample features and trailers under the repeat policy, place all trailers first, and put an intermission between features. Delegate runtime sums and mean-based trailer estimate and return a consecutive minute timeline with exact sampled clip identities.^[1]

Delegated operations used for this result: add numbers; mean. Their calculation or parsing conventions apply to the corresponding result fields.^{[2, 3]}

Input field	Meaning and units	Accepted input
features	Features	Required. Array of Object; no unknown keys.; minimum items 1; maximum items 64.
features[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 128.
features[].title	Title	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 512.
features[].minutes	Minutes	Required. Finite number; minimum 0.
trailers	Trailers	Required. Array of Object; no unknown keys.; maximum items 64.
trailers[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 128.
trailers[].title	Title	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 512.
trailers[].minutes	Minutes	Required. Finite number; minimum 0.
featureCount	Feature Count	Required. Safe integer; minimum 1; maximum 16.
trailerCount	Trailer Count	Required. Safe integer; minimum 0; maximum 32.
withoutReplacement	Without Replacement	Required. Boolean.
breakMinutes	Break Minutes	Required. Array of Finite number; minimum 0.; minimum items 1; maximum items 32.
seed	Optional numeric seed; takes precedence over context randomness. Without either, use the fixed tool.io default seed.	Optional. Safe integer.

Output field	Interpretation	Returned shape
features	Features	Required. Array of Object; no unknown keys.; minimum items 1; maximum items 16.
features[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 128.
features[].title	Title	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 512.
features[].minutes	Minutes	Required. Finite number; minimum 0.
trailers	Trailers	Required. Array of Object; no unknown keys.; maximum items 32.
trailers[].id	Literal identifier used independently of display labels.	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 128.
trailers[].title	Title	Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 512.
trailers[].minutes	Minutes	Required. Finite number; minimum 0.
breaks	Breaks	Required. Array of Finite number; minimum 0.; maximum items 15.
timeline	Timeline	Required. Array of Object; no unknown keys.; minimum items 1; maximum items 63.
timeline[].kind	Kind	Required. Text; one of "feature", "trailer", "intermission".
timeline[].id	Literal identifier used independently of display labels.	Required. Text. or Null.
timeline[].title	Title	Required. Text. or Null.
timeline[].minutes	Minutes	Required. Finite number; minimum 0.
timeline[].startMinute	Start Minute	Required. Finite number; minimum 0.
timeline[].endMinute	End Minute	Required. Finite number; minimum 0.
featureMinutes	Feature Minutes	Required. Finite number; minimum 0.
trailerMinutes	Trailer Minutes	Required. Finite number; minimum 0.
meanTrailerMinutes	Mean Trailer Minutes	Required. Finite number; minimum 0. or Null.
estimatedTrailerMinutes	Estimated Trailer Minutes	Required. Finite number; minimum 0.
intermissionMinutes	Intermission Minutes	Required. Finite number; minimum 0.
programMinutes	Program Minutes	Required. Finite number; minimum 0.
timelineEndMinute	Timeline End Minute	Required. Finite number; minimum 0.
randomness	Replay source and normalized 32-bit seed, or null seed for an advancing context source.	Required. Object; no unknown keys.
randomness.seed	Optional safe-integer replay seed; normalization and precedence are explained below.	Required. Safe integer. or Null.
randomness.source	Source	Required. Text; one of "context", "seed".

An explicit safe-integer seed takes precedence over injected context randomness and is normalized to an unsigned 32-bit integer. With no seed and no context source, replay uses the fixed tool.io default seed. A context source must return finite values from zero inclusive to one exclusive; its advancing state must be retained separately. randomness records the source and normalized seed, or null for context. These generators are not cryptographic random sources.

json

{
  "input": {
    "features": [
      {
        "id": "F1",
        "title": "Supplied feature A",
        "minutes": 90
      },
      {
        "id": "F2",
        "title": "Supplied feature B",
        "minutes": 100
      },
      {
        "id": "F3",
        "title": "Supplied feature C",
        "minutes": 110
      }
    ],
    "trailers": [
      {
        "id": "T1",
        "title": "Supplied trailer A",
        "minutes": 1
      },
      {
        "id": "T2",
        "title": "Supplied trailer B",
        "minutes": 2
      },
      {
        "id": "T3",
        "title": "Supplied trailer C",
        "minutes": 3
      }
    ],
    "featureCount": 2,
    "trailerCount": 2,
    "withoutReplacement": true,
    "breakMinutes": [
      5,
      10
    ],
    "seed": 42
  },
  "output": {
    "features": [
      {
        "id": "F2",
        "title": "Supplied feature B",
        "minutes": 100
      },
      {
        "id": "F1",
        "title": "Supplied feature A",
        "minutes": 90
      }
    ],
    "trailers": [
      {
        "id": "T3",
        "title": "Supplied trailer C",
        "minutes": 3
      },
      {
        "id": "T2",
        "title": "Supplied trailer B",
        "minutes": 2
      }
    ],
    "breaks": [
      5
    ],
    "timeline": [
      {
        "kind": "trailer",
        "id": "T3",
        "title": "Supplied trailer C",
        "minutes": 3,
        "startMinute": 0,
        "endMinute": 3
      },
      {
        "kind": "trailer",
        "id": "T2",
        "title": "Supplied trailer B",
        "minutes": 2,
        "startMinute": 3,
        "endMinute": 5
      },
      {
        "kind": "feature",
        "id": "F2",
        "title": "Supplied feature B",
        "minutes": 100,
        "startMinute": 5,
        "endMinute": 105
      },
      {
        "kind": "intermission",
        "id": null,
        "title": null,
        "minutes": 5,
        "startMinute": 105,
        "endMinute": 110
      },
      {
        "kind": "feature",
        "id": "F1",
        "title": "Supplied feature A",
        "minutes": 90,
        "startMinute": 110,
        "endMinute": 200
      }
    ],
    "featureMinutes": 190,
    "trailerMinutes": 5,
    "meanTrailerMinutes": 2.5,
    "estimatedTrailerMinutes": 5,
    "intermissionMinutes": 5,
    "programMinutes": 200,
    "timelineEndMinute": 200,
    "randomness": {
      "seed": 42,
      "source": "seed"
    }
  }
}

Limitations and assumptions

The mean-based estimate and direct trailer total can differ by numerical precision. A null mean denotes no trailers. The tool does not retrieve film runtimes, book screening rights, or model venue operations.
A replay requires the same complete input and implementation. The stated sampling convention applies within its eligible space. A finite draw does not exhaust all possible outputs; repeats remain possible unless a distinct-selection rule is explicit.
The field tables state structural bounds; cross-field constraints and bounded search or output budgets also apply. Unknown keys are rejected where the object contract disallows them. Input errors are distinct from null fields and deliberate invalid controls in a successful output.

Alternative or Complementary methods

For a supplied example, inspect the returned construction or delegated check directly. To evaluate a consumer, also test cases chosen for its own boundaries; a generated finite corpus does not establish exhaustive coverage.

References

Tool behavior and example: Random Cinema Program Runtime Generator — tool.io
Calculation or validation: arithmetic/add-numbers — tool.io
Calculation or validation: statistics/mean — tool.io

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