26:null 27:["$","title",null,{"children":"Monte Carlo Introduction: Customer Service | Ron Smith | Observable"}] 2c:T13ab,{ console.clear(); svg.selectAll("*").remove(); // Initialize time and time step let t = 0; let dt = 0.005; svg.append("text") .attr("id", "curTime") .attr("x", X(0.45)) .attr("y", -marg/4) .attr("font-size", 20) .text("t = " + t.toFixed(1)); // Initialize customer and server queues let q = []; let nextArrival = 0; let customerID = 0; mutable nCustLost = 0; mutable nCustServ = 0; let s =[]; for (let n=0;n 0) { let openStation = getOpenStation(s); // Check if any service stations are open if (openStation > -1) { // Get the customer who has been waiting the longest and move to the service queue let cust = q.shift(); // Determine when their service will be done cust[3] = t+getServTime(); // Compute the position of the server window cust[0] = 0.05+(openStation*stationWidth); cust[1] = stationHeight/2; // Add customer to service array s[openStation] = cust; // Animate the transition svg.selectAll("[id=c" + cust[4] + "]") .transition() .duration(1000) .attr("cx", X(cust[0])) .attr("cy", Y(cust[1])) .attr("r", 15) .style("fill", "blue"); } } // Check for customers done getting service for (let n=0;n 0) { mutable nCustLost+=1; svg.selectAll("[id=c" + s[n][4] + "]") .transition() .duration(200) .attr("r", 100) .style("fill", "red") .style("opacity",0) .remove(); s[n] = [-1,-1,Infinity,Infinity,-1]; mutable lostRevenue+=(viewof revenuePerSale.value); } } yield(svg.node().parentNode) } }2d:[] 2a:{"id":"043964ffc54fd602","slug":"monte-carlo-introduction-customer-service/2","title":"Monte Carlo Introduction: Customer 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wait is random (minimum of 1 time unit)\n### 3) First come / first serve\n### 4) Service time is random (minimum of 1 time unit)\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":374,"value":"md`--- ---`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":78,"value":"viewof sTime = slider({\n min: 1.1, \n max: 10, \n step: 0.1, \n value: 1.1, \n title: md `Average service time`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":388,"value":"viewof serverCost = slider({\n min: 5, \n max: 30, \n step: 1, \n value: 12, \n title: md `Cost per server per unit time`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":505,"value":"viewof operatingCost = slider({\n min: 1, \n max: 100, \n step: 1, \n value: 10, \n title: md `Operating cost per unit time`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":416,"value":"md`--- --- \n# Business report`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":302,"value":"html`${'Happy Customers: ' + nCustServ}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":309,"value":"html`${'Bad yelp reviews: ' + nCustLost}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":404,"value":"html`${'Total sales: $' + totalSales.toFixed(0)}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":411,"value":"html`${'Total cost: $' + totalCost.toFixed(0)}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":413,"value":"md `### ${html`${'Net profit: $' + (totalSales-totalCost).toFixed(0)}`}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":435,"value":"md `### ${html`${'Lost revenue: $' + (lostRevenue).toFixed(0)}`}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":55,"value":"$2c","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":454,"value":"viewof Nservers = slider({\n min: 1, \n max: maxServers, \n step: 1, \n value: 1, \n title: md `Number of servers`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":460,"value":"viewof aTime = slider({\n min: 0.1, \n max: 10, \n step: 0.1, \n value: 0.5, \n title: md `Average time between customer arrivals`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":483,"value":"viewof revenuePerSale = slider({\n min: 10, \n max: 100, \n step: 0.1, \n value: 40, \n title: md `Price per sale`\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":339,"value":"md`--- ---\n_Random number generation_`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":67,"value":"function expRnd(mu) {\n // Generate an exponential random variable with expected value mu\n return -Math.log(Math.random())*mu;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":70,"value":"function getArrTime() {\n return expRnd(viewof aTime.value); \n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":72,"value":"function getServTime() {\n return 1+expRnd(-1+viewof sTime.value);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":74,"value":"function getWaitTime() {\n return 1+expRnd(0.01);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":341,"value":"md`--- ---\n_Drawing_`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":343,"value":"import {slider,d3,addCircle,MakeStandardAxes} from \"@ronzor/common\";","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":5,"value":"msa = MakeStandardAxes(0,1,\"none\",0,1,\"none\",height,width,{top:marg,bottom:marg,left:marg,right:marg},-1)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":31,"value":"svg = msa[0];","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":34,"value":"X = msa[1];","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":36,"value":"Y = msa[2];","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":7,"value":"marg=40;","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":9,"value":"height=300","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":11,"value":"width=800","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":346,"value":"md`--- ---\n_Other settings, constants, and mutable variables_`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":45,"value":"maxServers = 10;","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":49,"value":"stationWidth = 1/maxServers;","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":51,"value":"stationHeight = 0.2","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":53,"value":"function stationStatus(n, maxN) {\n if (n