Make room before you start
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<html lang="en-US"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Make room before you start</title><style>*{box-sizing:border-box}body{margin:0;background:#f3f4f2;color:#202c32;font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}main{max-width:1120px;margin:auto;padding:30px 28px 60px}header{margin-bottom:22px}.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:750;color:#59676b}h1{font-size:clamp(25px,4vw,36px);line-height:1.15;letter-spacing:-.035em;margin:7px 0 10px}h2{font-size:21px;line-height:1.3;margin:0 0 16px}h3{font-size:17px;margin:0 0 10px}p{margin:8px 0 16px}label{display:block;font-size:14px;font-weight:650;margin:12px 0 5px}input,select,textarea,button{font:inherit}input,select,textarea{width:100%;min-width:0;border:1px solid #b6c0bf;border-radius:7px;background:#fff;color:#202c32;padding:10px 12px}textarea{resize:vertical;min-height:88px}input[type=checkbox]{width:18px;height:18px;vertical-align:middle;margin-right:8px}button{border:1px solid #b8c3c1;border-radius:7px;padding:10px 15px;background:#fff;color:#203632;font-weight:650;cursor:pointer}button.primary{background:#243f3c;color:white;border-color:#243f3c}button:hover{filter:brightness(.95)}button:disabled{opacity:.48;cursor:not-allowed}:focus-visible{outline:3px solid #b05814;outline-offset:3px}.buttons{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.panel{background:#fff;border:1px solid #d7ddda;border-radius:12px;padding:24px}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:22px}.row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.result{background:#e4eee8;border:1px solid #c5d6ca;border-radius:12px;padding:28px}.big{font-size:clamp(32px,5vw,56px);font-weight:740;line-height:1.14;letter-spacing:-.04em;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.muted{color:#59686a;font-size:14px}.tag{display:inline-block;background:#edf0ed;border-radius:4px;padding:3px 8px;font-size:12px;font-weight:700}.error{color:#9d301b;font-weight:650;min-height:24px;margin-top:10px}.note{border-left:3px solid #9a794a;padding:10px 15px;background:#faf5e9;margin:18px 0}.below{margin-top:28px}.record{white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;background:#f2f4f1;padding:18px;border-radius:8px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;vertical-align:top;border-bottom:1px solid #dce1dd;padding:12px 10px;overflow-wrap:anywhere}th{color:#59686a;font-size:12px}a{color:#2c5a6a;overflow-wrap:anywhere}details{margin-top:20px}summary{cursor:pointer;font-weight:650}hr{border:0;border-top:1px solid #d6dcd6;margin:22px 0}[hidden]{display:none!important}ol,ul{padding-left:23px}.statline{display:flex;gap:20px;flex-wrap:wrap;margin:18px 0}.statline strong{display:block;font-size:24px}.inline{display:flex;align-items:center;gap:8px}.inline label{margin:0} .blank{min-height:36px;border-bottom:1px dashed #aebbb5;color:#66736d;font-size:13px;padding:8px 0}@media(max-width:720px){main{padding:22px 18px 45px}.split{grid-template-columns:1fr}.panel,.result{padding:20px}.row{gap:12px}th,td{padding:10px 6px}}@media(max-width:400px){main{padding:18px 14px 40px}.big{font-size:34px}button{padding:10px 12px}.row{grid-template-columns:1fr}.panel,.result{padding:17px}}.capacity{display:flex;gap:36px;align-items:center;padding:20px 24px;background:#e7ece1;border:1px solid #cbd4bf;border-radius:12px;margin-bottom:20px}.capacity p{margin:4px 0}.board{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.lane{background:#e8ece8;border-radius:9px;padding:14px;min-height:230px}.lane h2{margin:0;font-size:18px}.task{background:#fff;border:1px solid #d3dbd4;border-radius:8px;margin-top:18px;padding:14px}.task h3{margin-top:8px}.blocked{font-size:13px;color:#8d381a;border-left:3px solid #b45624;padding-left:8px}@media(max-width:850px){.board{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:480px){.board{grid-template-columns:1fr}.lane{min-height:120px}.capacity{gap:20px;padding:18px}}</style></head><body><main><header><div class="eyebrow">Writing workflow · Fictional local board</div><h1>Make room before you start</h1></header>
<section class="capacity"><div><span class="eyebrow">Doing + Review</span><div class="big" id="wip">2 / 2</div></div><div><strong id="capacity">At capacity</strong><p>Blocked work stays in the active count.</p></div></section>
<div class="board" id="board"></div><p class="error" id="feedback" role="status"></p>
<section class="panel below"><h2>Move a task with a reason</h2><div class="row"><div><label for="task">Task</label><select id="task"><option>T1</option><option>T2</option><option selected>T3</option><option>T4</option></select></div><div><label for="destination">Proposed destination</label><select id="destination"><option selected>Doing</option><option>Review</option><option>Done</option><option>Ready</option></select></div></div><label for="evidence">Completed-review reference for Done</label><input id="evidence" placeholder="For the fictional next state, enter D2 for T2" maxlength="100"><div class="buttons"><button class="primary" id="move">Try move</button><button id="reset">Restore initial board</button></div><p class="muted">Start: entry into Doing. Finish: Review → Done with a supplied review reference. No started task can return to Ready in this bounded policy.</p></section>
<section class="below panel"><h2>Transition log</h2><div id="log" class="record">No local attempts yet.</div><details><summary>Policy and unknowns</summary><p>These moves affect the fictional local scenario only. A typed reference records your supplied scenario evidence; it does not verify a real review. T1's illustration dependency, actual owner, approval authority and follow-up route remain TO CONFIRM. Real cancellation or return exceptions need the workflow owner's retained decision.</p><p>No elapsed-time history is supplied, so age, cycle time, throughput and forecasts are unavailable.</p><a href="https://kanbanguides.org/the-kanban-guide">The Kanban Guide: workflow and WIP control</a></details></section><footer class="below muted">Local working example · Changes last only while this page is open.</footer></main><script>
const $=id=>document.getElementById(id);const txt=(id,v)=>$(id).textContent=v;const esc=s=>String(s).replace(/[&<>"']/g,c=>({'&':'&','<':'<','>':'>','"':'"',"'":'''}[c]));const on=(id,event,fn)=>$(id).addEventListener(event,fn);const num=(s,positive=false)=>{s=String(s).trim();if(!/^\d+(?:\.\d{1,6})?$/.test(s)||!Number.isFinite(+s)||+s>1000000||(positive&&+s<=0))throw Error(positive?'Enter a density greater than 0, up to 1,000,000, with at most six decimals.':'Enter a value from 0 to 1,000,000, with at most six decimals.');return +s};const fmt=n=>n!==0&&Math.abs(n)<.000001?n.toExponential(6):Number(n.toFixed(6)).toString();
const initial=[{id:'T1',name:'Draft the feature story',state:'Doing',blocked:true,evidence:''},{id:'T2',name:'Review the newsletter',state:'Review',blocked:false,evidence:''},{id:'T3',name:'Write the release note',state:'Ready',blocked:false,evidence:''},{id:'T4',name:'Review the welcome copy',state:'Done',blocked:false,evidence:'D4'}];let tasks=initial.map(t=>({...t})),logs=[];
function count(){return tasks.filter(t=>['Doing','Review'].includes(t.state)).length}
function move(id,dest,ref){const t=tasks.find(t=>t.id===id),before=count();let reason='';if(!t||!['Ready','Doing','Review','Done'].includes(dest))reason='Unknown task or state.';else if(dest===t.state)reason='Task is already in '+dest+'.';else if(t.state==='Done')reason='Finished tasks remain Done in this scenario.';else if(dest==='Ready')reason='Started work cannot return to Ready under this policy.';else if(t.state==='Ready'&&dest!=='Doing')reason='Queued work must cross the start boundary into Doing.';else if(t.state==='Ready'&&before>=2)reason='Cannot start '+id+': Doing + Review is '+before+' of limit 2.';else if(dest==='Done'&&(t.state!=='Review'||!ref.trim()))reason='Finish requires Review state and a completed-review reference.';const from=t?t.state:'unknown';if(!reason){t.state=dest;if(dest==='Done')t.evidence=ref.trim();reason='Moved with '+(dest==='Done'?'supplied review reference '+ref:'the declared workflow policy')+'.'}const held=from===(t?t.state:'unknown');logs.push(id+': '+from+' → '+dest+' | '+(held?'HELD':'MOVED')+' | WIP '+before+' → '+count()+' | '+reason);render();txt('feedback',reason);return {held,wip:count(),reason}}
function render(){txt('wip',count()+' / 2');txt('capacity',count()===2?'At capacity':'Capacity for '+(2-count())+' new task(s)');$('board').innerHTML=['Ready','Doing','Review','Done'].map(s=>'<section class="lane"><h2>'+s+'</h2><span class="muted">'+(['Doing','Review'].includes(s)?'Counts toward WIP':'Outside WIP')+'</span>'+tasks.filter(t=>t.state===s).map(t=>'<article class="task"><span class="eyebrow">'+t.id+'</span><h3>'+t.name+'</h3>'+(t.blocked?'<div class="blocked">Blocked · approved illustration missing</div>':'')+'<p class="muted">'+(t.evidence?'Review reference: '+esc(t.evidence):s==='Review'?'Awaiting review decision':s==='Ready'?'Queued; not started':'Started work')+'</p></article>').join('')+'</section>').join('');txt('log',logs.length?logs.join('\n'):'No local attempts yet.')}
on('move','click',()=>move($('task').value,$('destination').value,$('evidence').value));on('reset','click',()=>{tasks=initial.map(t=>({...t}));logs=[];$('evidence').value='';render();txt('feedback','Initial fictional board restored.')});window.app={move,count,getTasks:()=>tasks};render();
</script></body></html>