{"id":5951,"date":"2021-07-27T09:50:23","date_gmt":"2023-08-12T08:04:04","guid":{"rendered":"https:\/\/www.millerthomson.com\/ontario-court-underlines-the-evidence-and-analysis-required-to-establish-critical-path-delays\/"},"modified":"2026-03-18T12:48:04","modified_gmt":"2026-03-18T16:48:04","slug":"ontario-court-underlines-the-evidence-and-analysis-required-to-establish-critical-path-delays","status":"publish","type":"post","link":"https:\/\/www.millerthomson.com\/en\/insights\/construction-and-infrastructure-law\/ontario-court-underlines-the-evidence-and-analysis-required-to-establish-critical-path-delays\/","title":{"rendered":"Ontario Court underlines the evidence and analysis required to establish critical path delays"},"content":{"rendered":"\n<p>Who is responsible for delays in multi-party projects? What happens when there are multiple independent causes of delay in the same time period? How do courts determine if a delay impacts the critical path of the project schedule?<\/p>\n\n\n\n<p>The Ontario Superior Court of Justice was faced with these issues in the recent case <em>Schindler Elevator Corporation v Walsh Construction Company of Canada<\/em><a href=\"#_ftn1\" name=\"_ftnref1\">[1]<\/a> where several subcontractors, including Schindler Elevator Corporation (\u201c<strong>Schindler<\/strong>\u201d), had delayed the performance of their respective &nbsp;contracts. These delays allegedly impacted the critical path of the Women\u2019s College Hospital Capital Redevelopment Project (the \u201c<strong>WCH Project<\/strong>\u201d) led by Walsh Construction\/Bondfield Partnership (Walsh Construction Company of Canada and Bondfield Constructed Company Limited, collectively \u201c<strong>WBP<\/strong>\u201d).<\/p>\n\n\n\n<p>This case provided a thorough analysis on apportioning liability to one of multiple parties in a complex commercial construction project and a lengthy review of documented evidence and expert testimony on calculated impacts. The case also defined the meaning of \u201cconcurrent delays\u201d to be used in future construction disputes to ensure a fair and just assessment of responsibility for delays.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Background<\/h2>\n\n\n\n<p>In 2010, Women\u2019s College Partnership (\u201c<strong>ProjectCo<\/strong>\u201d) entered into a construction contract with WBP for the design, construction and maintenance of a new 624,000 square foot hospital replacing the old Women\u2019s College Hospital in downtown Toronto for a price of $272 million.<a href=\"#_ftn2\" name=\"_ftnref2\">[2]<\/a> The contract followed the same deadlines of ProjectCo\u2019s project agreement with Women\u2019s College Hospital (\u201c<strong>WCH<\/strong>\u201d), which was to contractually achieve Interim Completion by April 29, 2013, and achieve Substantial Completion by September 9, 2015.<a href=\"#_ftn3\" name=\"_ftnref3\">[3]<\/a><\/p>\n\n\n\n<p>WBP subcontracted Schindler to fabricate, deliver, and install all ten elevators for the new hospital facilities at an agreed base subcontract price of $2.1 million.<a href=\"#_ftn4\" name=\"_ftnref4\">[4]<\/a> It also engaged a substantial number of other subcontractors for the project including trades for curtain wall and glazing work, mechanical and electrical work, supply and installation of precast panels, painting services and various interior civil works.<a href=\"#_ftn5\" name=\"_ftnref5\">[5]<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The critical path delay<\/h2>\n\n\n\n<p>Before Schindler commenced work and throughout the installation, there were a number of project delays occurring around the same time.<a href=\"#_ftn6\" name=\"_ftnref6\">[6]<\/a> Upon Schindler\u2019s delay in its own work, WBP had issued numerous written notices of default and withheld all further payments.<a href=\"#_ftn7\" name=\"_ftnref7\">[7]<\/a> The Court found that there were some events that were out of Schindler\u2019s control and extended the time accordingly.<a href=\"#_ftn8\" name=\"_ftnref8\">[8]<\/a> However, Schindler was ultimately found to be liable for breach of its subcontract due to the delayed completion of the elevator work.<a href=\"#_ftn9\" name=\"_ftnref9\">[9]<\/a><\/p>\n\n\n\n<p>Schindler registered a claim for lien for almost $1 million in unpaid services and materials.<a href=\"#_ftn10\" name=\"_ftnref10\">[10]<\/a> WBP counterclaimed for $2.2 million in damages and contractual penalties for Schindler\u2019s delayed performance.<a href=\"#_ftn11\" name=\"_ftnref11\">[11]<\/a> However, in order to determine liability for overall project losses, it was necessary to find that Schindler caused critical path delay to the WCH Project. The \u201ccritical path\u201d was defined as \u201cthe longest chain of logically connected activities in a project schedule that, if delayed, will delay the end date of a project\u201d.<a href=\"#_ftn12\" name=\"_ftnref12\">[12]<\/a> WBP had the evidentiary onus of proving a causal connection between each of Schindler\u2019s delays and WBP\u2019s delay and impact losses, on a balance of probabilities, in order to indemnify WBP\u2019s costs for mitigation and delay penalties.<a href=\"#_ftn13\" name=\"_ftnref13\">[13]<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Defining concurrent delay<\/h2>\n\n\n\n<p>WBP acknowledged that other subcontractors also contributed to the project delay through the same period.<a href=\"#_ftn14\" name=\"_ftnref14\">[14]<\/a> In describing the concept of simultaneity of delays from two or more sources in large-scale construction projects, the Court turned to Glenn Grenier\u2019s article: \u201cEvaluating Concurrent Delay: Unscrambling the Egg\u201d.<a href=\"#_ftn15\" name=\"_ftnref15\">[15]<\/a> Grenier illustrated that evaluating a concurrent delay is a \u201cmuch more involved and speculative process compared to an isolated or singular cause of delay\u201d and the parties and the Court must break down the overall project delay into its component parts to apportion the time, responsibility and costs.<a href=\"#_ftn16\" name=\"_ftnref16\">[16]<\/a><\/p>\n\n\n\n<p>The Court rejected Schindler\u2019s expert testimony that concurrent delay meant there were two co-critical, co-controlling activities that had the same timing and duration.<a href=\"#_ftn17\" name=\"_ftnref17\">[17]<\/a> Instead, it relied on the observation that delays starting and ending at the same time were rarely the reality and concurrent delays were more commonly experienced as overlapping events.<a href=\"#_ftn18\" name=\"_ftnref18\">[18]<\/a> At least in more complex cases of concurrency, a more flexible definition would avoid one party being held solely responsible for a project delay and would more likely lead to a fair and just result where it is supported that multiple parties delayed the project.<a href=\"#_ftn19\" name=\"_ftnref19\">[19]<\/a><\/p>\n\n\n\n<p>The Court ultimately found that there was no clear evidence that Schindler materially contributed to the overall critical path delay. While there was a delayed turnover of the Freight Elevators which directly impacted the immediate subsequent activity, the manner in which the subsequent activity caused delay to the overall project was not shown.<a href=\"#_ftn20\" name=\"_ftnref20\">[20]<\/a> Therefore, the Court concluded that Schindler did not cause or materially contribute to the failure to achieve the Interim Completion deadline.<a href=\"#_ftn21\" name=\"_ftnref21\">[21]<\/a><\/p>\n\n\n\n<p>However, in light of the extent of Schindler\u2019s performance delay, the Court concluded it would be inequitable to absolve Schindler entirely of causally connected losses and damages.<a href=\"#_ftn22\" name=\"_ftnref22\">[22]<\/a> The Court reviewed each of Schindler\u2019s disputed activities which allegedly caused the delay and assessed the evidence for each claim. The finding was that Schindler owed a total of $51,653.79 to WBP for its delay and the Court dismissed WBP\u2019s remaining claims for damages.<a href=\"#_ftn23\" name=\"_ftnref23\">[23]<\/a> The net result was WBP owing a sum of $650,786.20 for unpaid amounts to Schindler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Key takeaways<\/h2>\n\n\n\n<p>Following the <em>Schindler<\/em> decision, future dispute resolutions for delays in large, multi-party projects may see a flexible approach in defining concurrent delays to fairly distribute the responsibility of events where responsibility is due. Determining causation of the critical path delay will require clear evidence of the subcontractor\u2019s specific performance delay and how it materially contributed to the overall project delay.<\/p>\n\n\n\n<p>It is important to maintain a distinction between liability for breach of a subcontract and liability for overall project delay and associated losses. To claim unpaid amounts in the subcontract, Schindler had the evidentiary onus of proving any delays, impacts, and its right to an extension of time in accordance with the subcontract. To counterclaim losses for the overall project delay, WBP had the evidentiary onus of proving a material causal connection between Schindler\u2019s delays and the critical path delay. Thus, a breach of a subcontract does not necessarily mean liability for overall project delay losses.<\/p>\n\n\n\n<p>Accordingly, unanticipated delays should not hinder compliance with the contractual terms which govern project delays. In <em>Schindler<\/em>, the Court made evident that both WBP and Schindler were sophisticated parties who agreed to detailed terms dealing with payment, delay, notice of default, and default remedies.<a href=\"#_ftn24\" name=\"_ftnref24\">[24]<\/a> Significant weight was given to the contractual interpretation of the subcontract which governed the time period and remedies used in the Court\u2019s analysis.<\/p>\n\n\n\n<p>The decision in <em>Schindler<\/em> underlines the need for assertions of overall project delay to be supported by evidence that connects the contractor\u2019s delays or defaults with the project\u2019s critical path. Claims of overall project delay, in the absence of such evidence, are unlikely to succeed.<\/p>\n\n\n\n<p>Finally, cooperation, collegiality, and organization were recognized as key throughout the course of the lengthy and complex trial. The professionalism and the preparation of all the parties involved were \u201ca model example\u201d of how to present these cases to the Court.<a href=\"#_ftn25\" name=\"_ftnref25\">[25]<\/a> It is good practice to keep records of all work done for projects, including items such as work tickets, emails, incidents, shop drawings, shutdowns due to safety concerns, monthly reports and schedules, game plans, letters, invoices, cheques, and timesheets that clearly support their relation to the operation, the dates the work was performed, and when the work was undertaken. Detailed and diligent documentation by the parties involved will be important to support any future claims when projects get delayed.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><a href=\"#_ftnref1\" name=\"_ftn1\">[1]<\/a> <a href=\"https:\/\/www.canlii.org\/en\/on\/onsc\/doc\/2021\/2021onsc283\/2021onsc283.html?autocompleteStr=2021%20ONSC%20283%20&amp;autocompletePos=1\">2021 ONSC 283<\/a> [<em>Schindler<\/em>].<\/p>\n\n\n\n<p><a href=\"#_ftnref2\" name=\"_ftn2\">[2]<\/a> <em>Ibid<\/em> at para 11.<\/p>\n\n\n\n<p><a href=\"#_ftnref3\" name=\"_ftn3\">[3]<\/a> <em>Ibid<\/em> at para 10.<\/p>\n\n\n\n<p><a href=\"#_ftnref4\" name=\"_ftn4\">[4]<\/a> <em>Ibid<\/em> at para 21.<\/p>\n\n\n\n<p><a href=\"#_ftnref5\" name=\"_ftn5\">[5]<\/a> <em>Ibid<\/em> at para 24.<\/p>\n\n\n\n<p><a href=\"#_ftnref6\" name=\"_ftn6\">[6]<\/a> <em>Ibid<\/em> at para 26.<\/p>\n\n\n\n<p><a href=\"#_ftnref7\" name=\"_ftn7\">[7]<\/a> <em>Ibid<\/em> at para 35.<\/p>\n\n\n\n<p><a href=\"#_ftnref8\" name=\"_ftn8\">[8]<\/a> <em>Ibid<\/em> at para 27.<\/p>\n\n\n\n<p><a href=\"#_ftnref9\" name=\"_ftn9\">[9]<\/a> <em>Ibid<\/em> at para 266.<\/p>\n\n\n\n<p><a href=\"#_ftnref10\" name=\"_ftn10\">[10]<\/a> <em>Ibid<\/em> at para 5.<\/p>\n\n\n\n<p><a href=\"#_ftnref11\" name=\"_ftn11\">[11]<\/a> <em>Ibid<\/em> at para 268.<\/p>\n\n\n\n<p><a href=\"#_ftnref12\" name=\"_ftn12\">[12]<\/a> <em>Ibid<\/em> at para 296.<\/p>\n\n\n\n<p><a href=\"#_ftnref13\" name=\"_ftn13\">[13]<\/a> <em>Ibid<\/em> at para 292.<\/p>\n\n\n\n<p><a href=\"#_ftnref14\" name=\"_ftn14\">[14]<\/a> <em>Ibid<\/em> at para 37.<\/p>\n\n\n\n<p><a href=\"#_ftnref15\" name=\"_ftn15\">[15]<\/a> (2006), 53 CLR (3d) 46. This paper was presented by Grenier at the Ontario Bar Association Conference for the Construction Law Section in Toronto in 2006. Grenier was a Partner and Head of the Construction Law Practice Group at Lang Michener LLP in Toronto.<\/p>\n\n\n\n<p><a href=\"#_ftnref16\" name=\"_ftn16\">[16]<\/a> <em>Schindler<\/em>, <em>supra<\/em> note 1 at para 303.<\/p>\n\n\n\n<p><a href=\"#_ftnref17\" name=\"_ftn17\">[17]<\/a> <em>Ibid<\/em> at para 346.<\/p>\n\n\n\n<p><a href=\"#_ftnref18\" name=\"_ftn18\">[18]<\/a> <em>Ibid<\/em>.<\/p>\n\n\n\n<p><a href=\"#_ftnref19\" name=\"_ftn19\">[19]<\/a> <em>Ibid<\/em>.<\/p>\n\n\n\n<p><a href=\"#_ftnref20\" name=\"_ftn20\">[20]<\/a> <em>Ibid<\/em> at para 347.<\/p>\n\n\n\n<p><a href=\"#_ftnref21\" name=\"_ftn21\">[21]<\/a> <em>Ibid<\/em>.<\/p>\n\n\n\n<p><a href=\"#_ftnref22\" name=\"_ftn22\">[22]<\/a> <em>Ibid<\/em> at para 348.<\/p>\n\n\n\n<p><a href=\"#_ftnref23\" name=\"_ftn23\">[23]<\/a> <em>Ibid<\/em> at para 448.<\/p>\n\n\n\n<p><a href=\"#_ftnref24\" name=\"_ftn24\">[24]<\/a> <em>Ibid<\/em> at para 136.<\/p>\n\n\n\n<p><a href=\"#_ftnref25\" name=\"_ftn25\">[25]<\/a> <em>Ibid<\/em> at para 458.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Who is responsible for delays in multi-party projects? What happens when there are multiple independent causes of delay in the same time period? How do courts determine if a delay impacts the critical path of the project schedule? The Ontario Superior Court of Justice was faced with these issues in the recent case Schindler Elevator [&hellip;]<\/p>\n","protected":false},"author":100,"featured_media":14341,"parent":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[539],"insight-format":[416],"class_list":["post-5951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construction-and-infrastructure-law"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ontario Court underlines the evidence and analysis required to establish critical path delays | Miller Thomson<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.millerthomson.com\/en\/insights\/construction-and-infrastructure-law\/ontario-court-underlines-the-evidence-and-analysis-required-to-establish-critical-path-delays\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ontario Court underlines the evidence and analysis required to establish critical path delays | Miller Thomson\" \/>\n<meta property=\"og:description\" content=\"Who is responsible for delays in multi-party projects? 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