The SistematikWork blog

Practical writing on industrial engineering: formulas explained, tools broken down, and lessons from the field. Written by engineers and students in the community.

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2 articles
Energy & Systems

How does your smart meter know how much you owe?

A meter measures kilowatt-hours. A billing engine turns them into money. A payment system moves it. Where electrical engineering, computer science and FinTech meet, and what breaks when one of them fails.

HJMuhammad Hamza Junaid12 Oct 20269 min read
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A 2% meter error
Rs. 100
On a single bill
Manufacturing & Operations

Why three 90% scores give you 73% OEE

OEE multiplies Availability, Performance and Quality instead of averaging them. Here is the math, a worked shift, and why reporting uptime hides most of your losses.

AGAli Gohar7 Oct 20266 min read
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90% × 90% × 90%
= 73%
Not 90%

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