Waiter

Waiter is a simple library for estimating wait times and required capacity in web and mobile marketplaces. Despite its focus, waiter aims to be useful for capacity planning wherever there's a queue coupled with a finite ability to process the queue.

Example Usage

//For a specified maximum wait time, output the required hourly supply
var waiter = require('waiter')
var uberPeakHours = [13, 18] //peak hours for the app are between 1pm and 6pm
var hourlyDemand = 100 
var peakDemand = 300 
var rideDurations = [5, 60] 
var maxWaitTime = 5
var hourlySupply = waiter.hourlySupply(uberPeakHours, hourlyDemand, peakDemand, rideDurations, maxWaitTime)

Web Usage

A hosted version of waiter useful for getting quick estimates is available here.

Installation

$ npm install waiter

Quick Start

Compute wait times:

  waiter.waitTime(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, hourlySupply)

Compute hourly supply:

  waiter.hourlySupply(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, maxWaitTime)

Plots and Statistics:

  waiter.waitTimeStats(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, hourlySupply)
  waiter.waitTimePlot(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, hourlySupply)
  
  waiter.hourlySupplyStats(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, maxWaitTime)
  waiter.hourlySupplyPlot(normalHours, hourlyDemand, peakHours, peakDemand, serviceLengths, maxWaitTime)

Features

• Wait time estimation
• Capacity planning
• Work in system (virtual waiting time)

Contributors

• Author: nicktesla

License

MIT