mail@mabbaz.com Abu Dhabi, UAE

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Writing about enterprise tech and applied AI

Notes on ERP implementations, integration patterns, data engineering and applied AI, from 22 years of shipping enterprise systems.

Reliability Sep 27, 2026
OEE: Overall Equipment Effectiveness Explained
What OEE is, how availability, performance and quality combine, the six big losses behind it, and the definitional choices that make OEE comparisons useless.
Reliability Sep 27, 2026
MTTR: Meaning, Formula and How to Improve It
What MTTR really measures, the four different clocks people call MTTR, why the boundary you pick changes the number, and how to genuinely improve it.
Reliability Sep 27, 2026
MTBF: Mean Time Between Failures Explained
What MTBF measures and what it does not: why it applies to repairable items, why it is not a lifetime, and the assumptions that make it easy to misread.
Preventive Maintenance Sep 27, 2026
Total Productive Maintenance (TPM): A Complete Guide
What TPM is, why it is an operating philosophy rather than a maintenance programme, autonomous maintenance, the six big losses, and why most TPM rollouts stall.
HVAC Sep 27, 2026
Cooling Tower Maintenance Checklist
What cooling tower maintenance actually covers and why each task exists, from water treatment and fill condition to drift eliminators and mechanical checks.
HVAC Sep 27, 2026
What Is a Heat Exchanger? Types and How It Works
What a heat exchanger does, the main types from shell and tube to plate, counterflow against parallel flow, and why fouling quietly destroys performance.
HVAC Sep 27, 2026
What Is a VAV System? Variable Air Volume Explained
How variable air volume works, why varying flow beats varying temperature, the parts of a VAV box, and the control problems that make VAV systems misbehave.
HVAC Sep 27, 2026
Chiller vs VRF: What's the Difference?
Chilled water against VRF: how each distributes cooling, where each genuinely suits, and the maintenance and resilience trade-offs nobody mentions up front.
HVAC Sep 27, 2026
AHU vs FCU: What's the Difference?
AHU against FCU compared properly: what each is for, fresh air provision, where each sits in a building, and why the distinction changes your PM programme.
HVAC Sep 27, 2026
What Is an FCU? Fan Coil Unit Explained
What a fan coil unit is and how it differs from an AHU, two pipe against four pipe, where FCUs suit, and the maintenance problems they reliably create.

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