{"id":1494,"date":"2025-12-06T08:03:32","date_gmt":"2025-12-06T07:03:32","guid":{"rendered":"https:\/\/control-advent.com\/?p=1494"},"modified":"2025-12-06T08:03:32","modified_gmt":"2025-12-06T07:03:32","slug":"06-who-controls-the-workshop-temperature-best","status":"publish","type":"post","link":"https:\/\/control-advent.com\/?p=1494","title":{"rendered":"06 &#8211; Who controls the workshop temperature best?"},"content":{"rendered":"\n<p>Santa is determined to keep the <strong>temperature inside his Christmas Workshop<\/strong> perfectly stable. But every now and then, when someone opens the giant wooden workshop door, a cold North-Pole draft blows in and chills the room.<\/p>\n\n\n\n<p>From previous experiments, the elves now know that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Every gust of cold air lowers the workshop temperature by exactly 2 \u00b0C.<\/li>\n\n\n\n<li>A small wind-chime sensor rings the moment the door begins to open, <em>before<\/em> the temperature actually starts falling.<\/li>\n\n\n\n<li>A precise wall-thermometer shows the current workshop temperature.<\/li>\n<\/ul>\n\n\n\n<p>The elves propose a number of different control strategies:<\/p>\n\n\n\n<p><strong>Strategy 0 (Elf Chillbert): <\/strong>\u201cI propose we do absolutely nothing. Temperature goes down, temperature goes up \u2014 that\u2019s life in the North Pole! Why fight nature? Also, it\u2019s cheaper.\u201d<\/p>\n\n\n\n<p><strong>Strategy 1 (Elf Crystal): <\/strong>\u201cI propose we&nbsp; listen to the wind chime.<br>Whenever the door opens, we measure how strong the draft is, calculate the expected cooling (since we know that \u2018One unit of draft \u2192 2 \u00b0C drop\u2019). Thus, before the workshop cools, we turn up the heating by <em>exactly<\/em> the right amount! And no need to add corrections afterward; we rely entirely on this prediction\u201d.<\/p>\n\n\n\n<p><strong>Strategy 2 (Elf Sagesip): <\/strong>\u201cI propose we watch the wall-thermometer.&nbsp; If the workshop temperature falls below the target, we heat it. If it is too warm we cool. Let\u2019s not guess things out \u2014 let\u2019s react to what actually happens inside the workshop!\u201d<\/p>\n\n\n\n<p><strong>Strategy 3 (Elf Snowbell): <\/strong>\u201cI propose that we do what you two, Crystal and Sagesip, just proposed: we take action as soon as the chime rings <strong>and <\/strong>do what Sagesip does with the thermometer. I would indeed counteract the expected cooling immediately <strong>and<\/strong> correct any leftover error afterward.\u201d<\/p>\n\n\n\n<p><strong>Strategy 4 (Elf Maxacta):<\/strong>\u201cI propose a bold strategy: whenever the chime rings, we turn the heater to MAXIMUM, so to be safe AND be fast. And If it gets too warm\u2026 well\u2026 we\u2019ll open a window!\u201d<\/p>\n\n\n\n<p>What would you do? Which elf do you think has the best idea for keeping the workshop temperature closest to Santa\u2019s desired value?<\/p>\n\n\n\n<p>a. \ud83e\uddca\ud83d\ude0c\ud83c\udf84 Chillbert \u2014 I need to chill out, at least this December!<br>b. \ud83d\udd14\ud83d\udccf\u2744\ufe0f Crystal \u2014 I want to act early!<br>c. \ud83c\udf21\ufe0f\ud83d\udc40\ud83e\udde4 Sagesip \u2014 I don\u2019t like betting when I may get a cold. Let\u2019s react to the actual temperature.<br>d. \ud83c\udfb6\ud83d\udee0\ufe0f\u2728 Snowbell \u2014 I like combining ideas from different people.<br>e. \ud83d\udd25\u26a1\ud83e\ude9f Maxacta \u2014 We may not just keep the workshop steady, we can do it fast!<br>f. \ud83c\udf2c\ufe0f\ud83d\udeab\ud83c\udfe0 None \u2014 With that draft, it\u2019s impossible to keep the workshop steady!<br>g. \u2744\ufe0f\ud83d\udcbc\ud83d\udcaa I only work in cold workshops. Disturbances improve productivity.<\/p>\n\n\n<div class='bootstrap-yop yop-poll-mc'>\n\t\t\t\t\t\t\t<div class=\"basic-yop-poll-container\" style=\"background-color:#b70004; border:0px; border-style:solid; border-color:#b70004; border-radius:0px; padding:10px 10px;\" data-id=\"43\" data-temp=\"basic\" data-skin=\"minimal\" data-cscheme=\"black\" data-cap=\"0\" data-access=\"wordpress\" data-tid=\"\" data-uid=\"62f09f94605c2fa2299ffdb6671f4fd2\" data-pid=\"1494\" data-resdet=\"percentages\" data-show-results-to=\"\" data-show-results-moment=\"never\" data-show-results-only=\"false\" data-show-message=\"true\" data-show-results-as=\"bar\" data-sort-results-by=\"as-defined\" data-sort-results-rule=\"asc\"data-is-ended=\"0\" data-gdpr=\"no\" data-gdpr-sol=\"consent\" data-css=\".basic-yop-poll-container[data-uid] .basic-vote { text-align: center; }\" data-counter=\"0\" data-load-with=\"1\" data-notification-section=\"top\"><div class=\"row\"><div class=\"col-md-12\"><div class=\"basic-inner\"><div class=\"basic-message hide\" style=\"border-left: 10px solid #008000; padding: 0px 10px;\" data-error=\"#ff0000\" data-success=\"#008000\"><p class=\"basic-message-text\" style=\"color:#000000; font-size:14px; font-weight:normal;\"><\/p><\/div><div class=\"basic-overlay hide\"><div class=\"basic-vote-options\"><\/div><div class=\"basic-preloader\"><div class=\"basic-windows8\"><div class=\"basic-wBall basic-wBall_1\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_2\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_3\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_4\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_5\"><div class=\"basic-wInnerBall\"><\/div><\/div><\/div><\/div><\/div><form class=\"basic-form\"><input type=\"hidden\" name=\"_token\" value=\"c199c13674\" autocomplete=\"off\"><div class=\"basic-elements\"><div class=\"basic-element basic-question basic-question-text-horizontal\" data-id=\"43\" data-uid=\"430761c17cf726bc3c0ea646791ba58a\" data-type=\"question\" data-question-type=\"text\" data-allow-multiple=\"no\" data-min=\"1\" data-max=\"1\" data-display=\"horizontal\" data-colnum=\"\" data-display-others=\"no\" data-others-color=\"\" data-others=\"\"><div role=\"heading\" aria-level=\"5\" class=\"basic-question-title\" style=\"color:#ffffff; font-size:14px; font-weight:normal; text-align:center;\">Choose an option:<\/div><ul class=\"basic-answers basic-h-answers\"><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"356\" data-type=\"text\" data-vn=\"1\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[356]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[356]\" name=\"answer[43]\" value=\"356\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">a<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"357\" data-type=\"text\" data-vn=\"3\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[357]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[357]\" name=\"answer[43]\" value=\"357\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">b<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"358\" data-type=\"text\" data-vn=\"1\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[358]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[358]\" name=\"answer[43]\" value=\"358\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">c<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"362\" data-type=\"text\" data-vn=\"59\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[362]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[362]\" name=\"answer[43]\" value=\"362\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">d<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"363\" data-type=\"text\" data-vn=\"0\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[363]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[363]\" name=\"answer[43]\" value=\"363\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">e<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"365\" data-type=\"text\" data-vn=\"0\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[365]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[365]\" name=\"answer[43]\" value=\"365\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">f<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"366\" data-type=\"text\" data-vn=\"0\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[366]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[366]\" name=\"answer[43]\" value=\"366\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">g<\/span><\/label><\/div><\/li><\/ul><\/div><div class=\"clearfix\"><\/div><\/div><div class=\"basic-vote\"><a href=\"#\" class=\"button basic-vote-button\" role=\"button\" style=\"background:#ffffff; border:1px; border-style: solid; border-color:#000000; border-radius:0px; padding:5px 10px; color:#000000; font-size:14px; font-weight:normal;\">&gt;&gt;&gt;<\/a><\/div><\/form><div class=\"yop-poll-modal\"><div class=\"yop-poll-modal-content\"><div class=\"yop-poll-modal-header\"><span class=\"yop-poll-modal-close\">&times;<\/span><\/div><div class=\"yop-poll-modal-body\"><div class=\"yop-poll-form-group\"><label class=\"yop-poll-user-or-email-label\">Username or Email Address<\/label><input type=\"text\" class=\"yop-poll-user-or-email-input\" autocomplete=\"off\"><\/div><div class=\"yop-poll-form-group\"><label class=\"yop-poll-password-label\">Password<\/label><input type=\"password\" class=\"yop-poll-password-input\" autocomplete=\"off\"><\/div><div class=\"yop-poll-form-group submit\"><button class=\"button button-primary button-large yop-poll-login-button\">Log In<\/button><\/div><div class=\"yop-poll-form-group yop-poll-section-login-options\"><p><a href=\"https:\/\/control-advent.com\/wp-login.php?action=register\" target=\"_blank\">No account? Register here<\/a><\/p><p><a href=\"https:\/\/control-advent.com\/wp-login.php?action=lostpassword\" target=\"_blank\">Forgot password<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\n\n\n<p><strong>Related control topic: different control strategies<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Santa is determined to keep the temperature inside his Christmas Workshop perfectly stable. But every now and then, when someone opens the giant wooden workshop door, a cold North-Pole draft blows in and chills the room. From previous experiments, the &hellip; <span class=\"more-link\"><a href=\"https:\/\/control-advent.com\/?p=1494\" class=\"readmore\">Continue reading<span class=\"screen-reader-text\">06 &#8211; Who controls the workshop temperature best?<\/span><\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":1496,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[111],"class_list":["post-1494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","tag-2025-en"],"_links":{"self":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1494"}],"version-history":[{"count":2,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1494\/revisions"}],"predecessor-version":[{"id":1516,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1494\/revisions\/1516"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/media\/1496"}],"wp:attachment":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}