Module: PredictabilityEngine::Calculators::Cfd

Defined in:
lib/predictability_engine/calculators/cfd.rb

Class Method Summary collapse

Class Method Details

.calculate(work_items, start_date: nil, end_date: nil) ⇒ Object 



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# File 'lib/predictability_engine/calculators/cfd.rb', line 8

def self.calculate(work_items, start_date: nil, end_date: nil)
  events = collect_events(work_items)
  return [] if events.empty?

  results = process_events(events)
  fill_daily_gaps(results, start_date, end_date)
end

.collect_events(work_items) ⇒ Object 



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# File 'lib/predictability_engine/calculators/cfd.rb', line 16

def self.collect_events(work_items)
  arrival_data = work_items.map do |i|
    { date: i.start_date || i.end_date || PredictabilityEngine.today, type: :arrived }
  end
  departure_data = work_items.select(&:completed?).map { |i| { date: i.end_date, type: :departed } }
  (arrival_data + departure_data).sort_by { |e| [e[:date], e[:type] == :arrived ? 0 : 1] }
end

.forecast_series(items) ⇒ Object 



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# File 'lib/predictability_engine/calculators/cfd.rb', line 28

def self.forecast_series(items, **)
  CfdForecaster.forecast_series(items, **)
end

.forecast_summary(items) ⇒ Object 



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# File 'lib/predictability_engine/calculators/cfd.rb', line 24

def self.forecast_summary(items, **)
  CfdForecaster.forecast_summary(items, **)
end

.to_coordinates(cfd, start_date) ⇒ Object 



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# File 'lib/predictability_engine/calculators/cfd.rb', line 71

def self.to_coordinates(cfd, start_date)
  { dates: cfd.map { |d| (d[:date] - start_date).to_i },
    arrived: cfd.map { |d| d[:arrived] },
    departed: cfd.map { |d| d[:departed] } }
end

.with_forecast(work_items, percentiles: PredictabilityEngine::DEFAULT_PERCENTILES) {|{ summary: forecast, max_days: percentiles.map { |p| forecast[:"p#{p}"] }.max }| ... } ⇒ Object

Yields:

  • ({ summary: forecast, max_days: percentiles.map { |p| forecast[:"p#{p}"] }.max }) 


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# File 'lib/predictability_engine/calculators/cfd.rb', line 64

def self.with_forecast(work_items, percentiles: PredictabilityEngine::DEFAULT_PERCENTILES)
  forecast = forecast_summary(work_items, percentiles: percentiles)
  return yield(nil) unless forecast

  yield({ summary: forecast, max_days: percentiles.map { |p| forecast[:"p#{p}"] }.max })
end