{"id":58873,"date":"2026-03-27T08:00:51","date_gmt":"2026-03-26T23:00:51","guid":{"rendered":"https:\/\/norimen.net\/?p=58873"},"modified":"2026-05-16T18:02:35","modified_gmt":"2026-05-16T09:02:35","slug":"check-failure-assumption-biggest-mistake","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/check-failure-assumption-biggest-mistake\/","title":{"rendered":"When a lack of verification combines with assumptions, that\u2019s when the biggest mistakes happen on the job!"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

Who do you think is most likely to make a mistake at a construction site?<\/strong><\/p>\n

Newcomer? Mid-career? Or veteran?<\/p>\n

I\u2019m going to write this in a candid way, including some personal stories of my own.<\/p>\n

My younger days were full of mistakes and failures, so I could talk about my failures all day long, lol.<\/p>\n

\n

The Theory That Newcomers' Mistakes Aren't Really \"Mistakes\"<\/h2>\n

\"Newcomer's<\/p>\n

Let's start with the new hire.<\/p>\n

When it comes to new employees,I don't even know what the right answer is to begin with<\/strong>That's right, isn't it?<\/p>\n

That's why, even when they mess something up, they often don't even realize they've made a mistake.<\/p>\n

It sounds a bit like a riddle, but saying \u201cI don\u2019t even know if it\u2019s a mistake\u201d isn\u2019t really a mistake in a sense.<\/p>\n

For example, if you haven\u2019t been taught why it\u2019s necessary to monitor drill hole diameter and depth, even if there\u2019s a gap in the records, you\u2019ll probably just wonder, \u201cWas there a problem?\u201d<\/p>\n

 <\/p>\n

This isn't so much a problem with new employees as it is...Issues on the Teaching and Management Sides<\/strong>That's it.<\/p>\n

Just saying, \u201cMake sure to check this,\u201d isn\u2019t enough\u2014if you don\u2019t know what to check or why, it\u2019s not really a check.<\/p>\n

In that sense, mistakes made by new employees are often discovered while they\u2019re still at a \u201cstage where they can be recovered from.\u201d<\/p>\n

Any mistakes made by new employees are entirely the fault of their senior colleagues and supervisors!<\/p>\n

Newcomers, feel free to make mistakes! Minor mistakes help you gain experience and grow.<\/p>\n

\n

Mistakes by mid-level employees stem from \u201cinsufficient verification\u201d; they tend to use busyness as an excuse<\/h2>\n

\"Mid-career<\/p>\n

The most common mistakes made by mid-level employees are, as expected,\"Insufficient Verification\"<\/strong>That's it.<\/p>\n

I've been getting the hang of the job.<\/p>\n

I understand the process, too.<\/p>\n

My junior is tagging along, too.<\/p>\n

Once you're in that position, it inevitably turns into an \"assembly-line\" process.<\/p>\n

 <\/p>\n

When I'm laying out the formwork as I usually do, I sometimes realize that it's encroaching on neighboring property or that there aren't enough tiers for the required cross-section.<\/p>\n

You\u2019ve probably heard stories like this at your own job sites, right? You work on something for half a day, then realize a mistake and have to start all over again\u2026<\/p>\n

I end up thinking afterward, \u201cI should\u2019ve just checked,\u201d but,<\/p>\n

Realistically, it's tough to check everything in the midst of a busy work environment.<\/strong>I can see why.<\/p>\n

That\u2019s exactly why it\u2019s important to decide on the \u201ctiming\u201d for checking right from the start.<\/p>\n

Detailed instructions to the craftsmen, on-site guidance during downtime, and written instructions.<\/p>\n

Before construction begins, before switching to a different type of work, and after a change in instructions.<\/p>\n

Just keeping these points in mind makes a big difference.<\/p>\n

It\u2019s also important to identify the areas where you\u2019re most likely to make mistakes ahead of time!<\/p>\n

\n

Veterans' \"Assumptions\"\u2014These Are the Most Troublesome<\/h2>\n

\"Veteran<\/p>\n

This is actually about me, lol.<\/p>\n

As you gain more experience, you start to develop a sense of certainty\u2014a feeling that \u201cit\u2019s always like this, so it\u2019ll be fine.\u201d<\/p>\n

This in itself isn't bad. It speeds up decision-making, streamlines the process, and allows you to give clear instructions to younger staff.<\/p>\n

The only problem is\u2014<\/p>\n

Assuming, \"It's the same this time, too\"<\/strong>That's it.<\/p>\n

 <\/p>\n

\"It's usually like this\" and \"It's the same this time\" are two completely different things.<\/p>\n

This was a long time ago, but I once messed up the rebar for a 300-frame structure, lol (the design called for D13, but since there were bolts, I just assumed it was D16 on my own).<\/p>\n

There are so many cases of misunderstandings or not checking drawings, specifications, and special specifications thoroughly, aren't there?<\/p>\n

Looking back on it now, it really gives me the chills.<\/p>\n

\n

Assumptions + Zero Verification: This Combination Is the Most Dangerous<\/h2>\n

\"Confirmation\"<\/p>\n

(This picture had me laughing so hard\u2014I was like, \"A bolt right here!?\" lol)<\/p>\n

 <\/p>\n

If it were just a misconception, that would be one thing.<\/p>\n

As long as we check, we can still stop it.<\/p>\n

 <\/p>\n

The worst-case scenario is when \u201ca veteran\u2019s assumptions\u201d combine with \u201ca failure to double-check, as mid-level employees tend to do.\u201d<\/strong>But that's really bad.<\/p>\n

\"Believing without a doubt that I am right\" + \"Completely omitting the act of verification\"<\/p>\n

When these things happen at the same time, it leads to a major mistake.<\/p>\n

Moreover, when it comes to slope construction, mistakes canCannot be recovered<\/strong>That happens more often in this field than in other types of civil engineering work, doesn't it?<\/p>\n

 <\/p>\n

Construction on a slope can sometimes make it physically difficult to make adjustments midway through the process.<\/p>\n

If we take down the temporary scaffolding, rebuilding it will cost a fortune... That's scary!<\/p>\n

When construction defects are discovered during an inspection, the resulting losses aren\u2019t limited to the cost of repairs\u2014they also include lost labor hours, project delays, and damage to the contractor\u2019s reputation with the general contractor, all of which come crashing down at once.<\/p>\n

We can recover some of the data, but if we can't, it's going to be a real disaster.<\/p>\n

It would be great if insurance could cover it, but it\u2019s really hard to regain trust beyond that, isn\u2019t it!?<\/p>\n

Trust is more important than money! (This is an absolute must!!)<\/p>\n

Luckily, I've never been in that situation, so I've gotten off pretty scot-free lol<\/p>\n

\n

So, what should I do?<\/h2>\n

\"Meeting\"<\/p>\n

The solution is simple.<\/p>\n

\u2460 Use experience as a \u201creference,\u201d but don\u2019t treat it as the \u201canswer.\u201d<\/strong><\/p>\n

\"This is how it was last time\" is simply a fact; it does not serve as a basis for saying, \"We'll do it this way again.\"<\/p>\n

Rule of thumb is a useful tool, but it\u2019s dangerous to rely on it as your sole criterion for judgment.<\/p>\n

 <\/p>\n

\u2461 Make checking a routine part of your day<\/strong><\/p>\n

Not \"I'll do it when I feel like checking,\" but rather,Decide that \"I will always check at this point\"<\/strong>\u3002<\/p>\n

For us, it\u2019s definitely two days before drilling\u2014two days before the work starts. The day before is a no-go!!! lol<\/p>\n

Just by making it a rule to \u201calways check\u201d this one thing, you can prevent a lot of major mistakes.<\/p>\n

 <\/p>\n

\u2462 Consciously look for what\u2019s different this time<\/strong><\/p>\n

The more experienced someone is, the more they tend to stick to their usual routine.<\/p>\n

That\u2019s exactly why, before starting construction, you should take just five minutes to think about, \u201cWhat\u2019s different about this job site compared to usual?\u201d<\/p>\n

Ground conditions, design specifications, and changes to instructions. We simply can\u2019t move forward without verifying these from scratch\u2014that\u2019s all there is to it.<\/p>\n

It\u2019s essential to verify everything on-site\u2014drawings, column diagrams, designs, special specifications, and so on.<\/p>\n

Or maybe things like the terrain, the location of the office, or what it\u2019s like on rainy days?<\/p>\n

\n

Who makes the most mistakes on the job?<\/p>\n

The answer to that question is, in my opinion,\"Someone who failed to double-check despite having experience\"<\/strong>That's what I think.<\/p>\n

Mistakes made by new employees are a training issue.<\/strong><\/span><\/p>\n

Mistakes by mid-level players are a matter of habit.<\/strong><\/span><\/p>\n

Mistakes made by veterans stem from overconfidence.<\/strong><\/span><\/p>\n

 <\/p>\n

While none of these can be completely prevented,The moment you think, \u201cI\u2019ll be fine,\u201d is the most dangerous.<\/strong>\u3002<\/p>\n

Check and double-check to avoid mistakes.<\/p>\n

Trust your own experience, but don't be overconfident.<\/p>\n

It's easy to say, but it's actually really hard, lol.<\/p>\n

I mess up all the time, too! Maybe my brain is getting smaller as I get older...<\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. Who do you think is most likely to make mistakes on a construction site? Newcomers? Mid-level workers? Or veterans? I\u2019m going to be completely honest here, including some stories from my own experience. My early days were full of mistakes and failures, so when it comes to stories about failures\u2026<\/p>","protected":false},"author":2,"featured_media":58882,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[182,3124,14240,14241],"class_list":["post-58873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-others","tag-182","tag-3124","tag-14240","tag-14241"],"acf":[],"yoast_head":"\n\u73fe\u5834\u30df\u30b9\u601d\u3044\u8fbc\u307f\u30d9\u30c6\u30e9\u30f3\u304c\u898b\u843d\u3068\u3059\u539f\u56e0 - 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