This summary is not the rule. The rule text controls.
If your lawyer's office makes a mistake that causes a delay or a missed deadline in your case, this rule allows the judge to forgive that mistake. It makes clear that judges have the power to excuse these errors, even though the law doesn't require them to do so automatically.
This matters because courts used to be stricter about missed deadlines and paperwork errors. This rule tells judges they are allowed to use their own judgment and look at what's fair, instead of automatically punishing someone for their lawyer's office slipping up. Common examples include a filing that got sent late, a document that got lost in the office, or a deadline that got missed because of a staff error.
To use this rule, you still have to meet certain requirements. These are spelled out in other parts of the law, specifically section 3012(d) and rule 5015(a). Basically, you need to show the court a good reason for the mistake and show that you have a real defense or case worth pursuing. If you can do that, the judge has the option to give you another chance instead of shutting your case down over an office error.