the thing that's slowing everything down

bottleneck

noun|/ˈbɑː.təl.nek/

A point of congestion that slows down progress

Examples

In a meeting

The approval process is the main bottleneck in our workflow.

Over coffee

Traffic at that intersection is always a bottleneck during rush hour.

Why this word

obstacle

bottleneck specifically identifies a constraint that limits flow/throughput in a process, while obstacle is any general impediment

delay

bottleneck pinpoints the specific constraining point in a system, while delay only describes the symptom or result

problem

bottleneck precisely identifies a capacity-limiting constraint in workflow, while problem is vague about type and location

Usage tip

Use to identify specific obstacles causing delays in processes or systems

Etymology

English: from the narrow neck of a bottle that restricts flow

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