Shows / Deep End Era. Engineering with Sankalp
Deep End Era. Engineering with Sankalp
Long-form engineering, computing and mathematics. Created by Sankalp Thakur. A Transient Labs production. Website: https://transientlabs.ai/the-deep-end GitHub: https://github.com/sankalpsthakur X: https://x.com/sankalpsthakur LinkedIn: https://www.linkedin.com/in/sankalpthakur/ Hugging Face: https://huggingface.co/sankalpsthakur Scripts: Claude Opus. Synthetic narration: Edge TTS (episodes 1–96) and Kokoro, credited per episode. Reviewed, listened to and approved by Sankalp Thakur.
Episodes
Deep End Era. Engineering with SankalpThe Control Catalogue and the Requirements List: ISO/IEC 27002:2022 versus IEC 62443-3-3, and ISO/IEC 27019:2024 for Energy Process Control
Leila Mansour, the Al Sahil OT security architect, and Henrik Dahl, the group information security manager, build one mapping table between two standards that…
Deep End Era. Engineering with SankalpTwo Management Systems, One Plant: ISO/IEC 27001:2022 in an OT Context, ISMS versus CSMS
Noor Haddad, the Al Sahil control systems security lead, and Henrik Dahl, the operating company's group information security manager, discover that they have…
Deep End Era. Engineering with SankalpFrom FEED to First Gas: IEC 62443 Across the EPC Project Lifecycle
Rafa Ortega, now on the operator's side, and Amira Saleh, the EPC contractor's control systems security lead, walk through four years of the train five…
Deep End Era. Engineering with SankalpWho Checks the Checkers? 62443 Certification: ISASecure, the IECEE Scheme, and Writing 62443 into Vendor Specifications
Noor Haddad and Tomás Herrera sit on the train five technical bid evaluation panel with four vendor proposals, three kinds of certificate and one deadline…
Deep End Era. Engineering with SankalpFour Kinds of Box: IEC 62443-4-2 Technical Security Requirements for IACS Components
Rafa Ortega and Tomás Herrera run the train five integration lab, where every component bound for the safety and control zones is unboxed, tested against its…
Deep End Era. Engineering with SankalpBuilt In, Not Bolted On: IEC 62443-4-1 Secure Product Development Lifecycle
Khalid Mansour, an Al Sahil instrument engineer seconded to the controller vendor's development centre for six months, follows a single firmware feature from…
Deep End Era. Engineering with SankalpWalls, Watchers and Spare Parts: IEC 62443-3-3 Part Two — FR5 to FR7, Compensating Countermeasures, Remote Access and Colonial Pipeline
Diego Ferreira and Leila Nasser walk the train five network from the field I/O to the corporate firewall, then spend a night shift in the security operations…
Deep End Era. Engineering with SankalpHearing the Requirements: IEC 62443-3-3 System Security Requirements, Part One — FR1 to FR4
Noor Haddad and Sven Lindqvist take the cybersecurity requirements specification for the Al Sahil fifth gas train and turn it into a line-by-line conversation…
Deep End Era. Engineering with SankalpSetting the Target: IEC 62443-3-2 Risk Assessment, Part Two — Detailed Assessment, SL-T and the Cybersecurity Requirements Specification, with Triton
Leila Nasser and Rafa Ortega return to the fourteen zones they drew for the Al Sahil fifth gas train, and take the safety zone through the full detailed…
Deep End Era. Engineering with SankalpDrawing the Lines: IEC 62443-3-2 Risk Assessment, Part One — the System Under Consideration, Initial Risk, and Zones and Conduits
The Al Sahil Gas Complex is adding a fifth gas train, and this time the EPC's cyber risk engineer Leila Nasser wants the security design to start at FEED, not…
Deep End Era. Engineering with SankalpRating the Running Plant: IEC PAS 62443-2-2:2025 and the Security Protection Rating
Two years after start-up, the Al Sahil Gas Complex's board asks a simple question: how secure is the plant, today, as operated? Its OT security lead Khalid…
Deep End Era. Engineering with SankalpThe Builders' Rulebook: IEC 62443-2-4 for Integrators and EPCs, and the TS 62443-6-1 Assessment
At the vendor's factory acceptance test shop, integration engineer Tomás Iglesias receives a forty-item checklist from the EPC, headed "IEC 62443-2-4…
Deep End Era. Engineering with SankalpPress Update? Patch Management in the IACS Environment and the Realities of Legacy DCS
Vendor integration engineer Tomás Iglesias has qualified more DCS patches than he can count. Rotating equipment engineer Sven Lindqvist has a compressor whose…
Deep End Era. Engineering with SankalpRunning the House for Twenty Years: IEC 62443-2-1:2024, the Asset Owner's Security Programme
Commissioning manager Rafa Ortega has three months left before he hands the Al Sahil Gas Complex over to the operator, and shift lead Noor Haddad wants to know…
Deep End Era. Engineering with SankalpRooms, Corridors and Locks: Zones, Conduits, Foundational Requirements and Security Levels
Khalid Mansoori has spent twenty years drawing hazardous-area zones on plot plans. Leila Darwish, the site's data architect, needs to put a new historian link…
Deep End Era. Engineering with SankalpThe Map Before the Territory: ISA/IEC 62443, Its History and Its Parts
On her first morning at the Al Sahil Gas Complex, OT cybersecurity architect Priya Raghavan is handed a forty-page vendor questionnaire that says "comply with…
Deep End Era. Engineering with SankalpNot Just Electrical: ISO 80079-36 and -37 for Mechanical Equipment, and How the IECEx System Holds It All Together
A new hydrogen recycle compressor turns up with an electrical motor full of certificates and a gearbox, coupling and seal system with none. Elena wants to know…
Deep End Era. Engineering with SankalpThe First Five Years: IEC 60079-17 Inspection, IEC 60079-19 Repair, and the IECEx Schemes for Service Facilities and People
Rashid hands the hydrogen skid to Joseph with a dossier, a smile and a warning. Over five years, a gland loosens, a motor goes away for rewind, a junction box…
Deep End Era. Engineering with SankalpBefore the First Switch-On: IEC 60079-14:2024, Installation Design, Cable Glands and the Verification Dossier
The hydrogen skid has arrived at Al Sahil, the cable trays are going up, and the contractor wants to energise in three weeks. Rashid asks for the verification…
Deep End Era. Engineering with SankalpToo Small to Burn: Intrinsic Safety, IEC 60079-11 and 60079-25, Entity Parameters, FISCO and Ethernet-APL
The cheapest-looking box on the hydrogen skid is a plastic-bodied pressure transmitter with no heavy enclosure at all, and it is going into the Zone 1 envelope…
Deep End Era. Engineering with SankalpFive Ways to Make a Box Safe: Flameproof, Increased Safety, Pressurisation, Encapsulation, Liquid and Powder Filling, and Dust Protection by Enclosure
Elena Petrova has a vendor package for the hydrogen-blending skid with a flameproof motor, an increased safety junction box, a pressurised analyser cabinet and…
Deep End Era. Engineering with SankalpReading the Nameplate: IEC 60079-0:2026, Equipment Protection Levels, Marking, and IECEx versus ATEX
Rashid Al Mansoori's old junction box is back on the table, with a dozen nameplates beside it, collected over twenty-five years from equipment that has been…
Deep End Era. Engineering with SankalpClouds and Layers: Dust Area Classification under IEC 60079-10-2, and the Hybrid Mixture Problem
The polymer plant next door makes polyethylene. Between the reactor and the pelletiser, the product is a fine white powder, still carrying traces of…
Deep End Era. Engineering with SankalpDrawing the Invisible Map: Gas Area Classification under IEC 60079-10-1
Elena Petrova said a hundred metres. The project manager wants to know where that number came from. Rashid Al Mansoori sits down with her and the new skid's…
Deep End Era. Engineering with SankalpThe Physics of a Spark: Flammability Limits, Ignition Energy, Gas Groups and Temperature Classes
A new hydrogen-blending skid is coming to Al Sahil. Every electrical item in the area was bought for natural gas, group IIA, T3. Elena Petrova has to explain…
Deep End Era. Engineering with SankalpThe Skid at the Boundary: ISO 13849-1, IEC 62061 and IEC 61511, and Who Owns the Safety Function
The compressor skid is beautiful. Stainless, compact, and covered in yellow safety labels in four languages. Its safety controller holds certificates for…
Deep End Era. Engineering with SankalpThe Books Behind the Book: IEC 61511-2, 61511-3, TR 61511-4 and TR 61511-0, and What Edition 3 Is Likely to Change
Five years after start-up, the regulator asks Al Sahil Train 4 for a revalidated hazard and risk assessment. Noor Al Shamsi discovers that half the arguments…
Deep End Era. Engineering with SankalpThe Long Years After Start-Up: IEC 61511 Part VII, Proof Testing, Partial Stroke, Bypasses, Demand Tracking and Management of Change
Train 4 is running. The commissioning team has gone home, and the safety instrumented system now belongs to the people who will live with it for twenty-five…
Deep End Era. Engineering with SankalpProving It Works: IEC 61511 Part VI, FAT, SAT, Validation and the Five Stages of Functional Safety Assessment
The program is clean and the hardware is built. Now Train 4 has to prove its safety instrumented functions work before a single molecule of gas goes into the…
Deep End Era. Engineering with SankalpThe Code That Must Not Fail: IEC 61511 Part V, SIS Application Software and the Clause 8.2.4 Cyber Risk Assessment
The hardware for SIF four one oh one dash oh three is settled. Now someone has to write the logic, and Hamad's first draft is three hundred rungs of clever…
Deep End Era. Engineering with SankalpBuilding the Barrier: IEC 61511 Part IV, SIS Design, Architecture, Voting, and the SIS/BPCS Separation
The safety requirements specification for SIF four one oh one dash oh three is signed. Now Diego Ferrer has to turn eighteen lines of requirements into…
Deep End Era. Engineering with SankalpThe Most Important Document: IEC 61511 Part III, the Safety Requirements Specification
Diego Ferrer has a cause and effect matrix for Train 4 that runs to thirty-two sheets. Noor Al Shamsi, who will look after the safety system for the next…
Deep End Era. Engineering with SankalpHow Much Is Enough: IEC 61511 Part II, Hazard and Risk Assessment, SIL Determination, Risk Graphs, LOPA by Ear and SIL 3 Creep
Day one of the SIL workshop for Train 4, and the very first scenario comes out at SIL 3. Hamad Al Mazrouei, who has facilitated more of these than he can…
Deep End Era. Engineering with SankalpThe Process Sector's Rulebook: IEC 61511-1 Part I, Scope, Management of Functional Safety, Competence and the Lifecycle
Train 4 at Al Sahil has a schedule, a budget and forty-one safety instrumented functions nobody has written down yet. Mariam Al Hosani, the operator's…
Deep End Era. Engineering with SankalpWhat the Paper Promises: IEC 61508 Parts IV to VII, FMEDA, SIL Certificates, Proven in Use and the Safety Manual
A pressure transmitter arrives at Al Sahil with a glossy certificate that says SIL 3 capable. Aisha Rahman wants to know what that sentence promises, and what…
Deep End Era. Engineering with SankalpBugs That Don't Wear Out: IEC 61508 Part III, Software, Systematic Capability and What Edition 3 Changes
The new burner management controller at Al Sahil is certified, but its application program is not: that one is written by the plant team, and it is where the…
Deep End Era. Engineering with SankalpCounting Hidden Failures: IEC 61508 Part II, Hardware, Fault Tolerance, Safe Failure Fraction and the Arithmetic of PFD
The new export pipeline at Al Sahil is rated for less than the wellhead shut-in pressure, so it needs a high integrity pressure protection system: SIL 3, three…
Deep End Era. Engineering with SankalpThe Mother Standard: IEC 61508 Part I, Origins, the Safety Lifecycle and the Map of Seven Parts
A furnace burner management system at Al Sahil is forty years old, built from relays, and nobody can buy the spares any more. The replacement will be…
Deep End Era. Engineering with SankalpBoxes, States and Averages: Reliability Block Diagrams, Markov Models and the Maths of Availability (IEC 61078, IEC 61165, IEC 61703)
Train Four's availability guarantee survived its first study, but the client's reliability consultant wants to see the working. Leila Darwish has to explain…
Deep End Era. Engineering with SankalpWill It Keep Running? Dependability Management, RAM Studies and the IEC 60300 Family
The Al Sahil Gas Complex is adding a new gas processing train, and the contract says it must be available ninety seven percent of the time. Commissioning…
Deep End Era. Engineering with SankalpWhy Did It Really Fail? Root Cause Analysis with IEC 62740, and the Risk Toolbox of IEC 31010
A pump on the condensate stabiliser at the Al Sahil Gas Complex has eaten four mechanical seals in nine months. Each time, the work order says "seal failed…
Deep End Era. Engineering with SankalpWorking Backwards from Disaster: Fault Trees, Event Trees, IEC 61025 and IEC 62502
A high-pressure separator overpressures and a flange lets go. How could that happen, and what happens next? Mariam Al Hosani, the process safety lead at the Al…
Deep End Era. Engineering with SankalpEvery Way It Can Break: FMEA, FMECA and IEC 60812
Sven Lindqvist has looked after compressors for twenty five years, and he has a rule: every machine tells you how it wants to die, if you ask it the right way…
Deep End Era. Engineering with SankalpNode Eight: A HAZOP Played Live, IEC 61882 Part II
Monday morning, session six, node eight. Aisha Bello's HAZOP team has one drawing on the screen: a high-pressure separator at sixty bar, its liquid draining…
Deep End Era. Engineering with SankalpWhat If It Goes the Wrong Way? HAZOP and IEC 61882, Part I
Aisha Bello spent four years as the quiet person typing in the corner of HAZOP meetings. Now, at the Al Sahil Gas Complex, she is running her first study as…
Deep End Era. Engineering with SankalpWho Writes the Rules? How the Standards World Works
A brand-new graduate at the Al Sahil Gas Complex asks a simple question: who decides what a "standard" is, and why does the project specification say IEC 61511…
Deep End Era. Engineering with SankalpRight in March: Machine Learning in Production, Drift, Fairness and Explanation (Machine Learning series finale)
A fictional building society's new loan model was right in March. By October nobody could say whether it still was, and one group of applicants was being…
Deep End Era. Engineering with SankalpSame Leaf, Different World: Transfer, Few-Shot and Meta-Learning, and Distribution Shift
A fictional crop-disease app built in Kenya stumbles in the coffee highlands of Peru: different light, different varieties, a disease it has never seen, and…
Deep End Era. Engineering with SankalpYou Can't Launder a Postcode: Graph Machine Learning, from PageRank to Message Passing
A fictional payments company finds a fraud ring in which every single transaction looked clean; only the shape of the connections gave it away. Fraud lead…
Deep End Era. Engineering with SankalpFour Million Photographs and Nobody to Look at Them: Self-Supervised, Semi-Supervised and Contrastive Learning
A fictional Scottish conservation trust has four million camera-trap photos, eleven thousand labels and just forty-one tagged wildcats. Engineer Kofi Mensah…
Deep End Era. Engineering with SankalpToo Faithful and Not Faithful Enough: Generative Models from VAEs to GANs and Flows
A fictional insurer's synthetic claims data matches every histogram, yet one record in two hundred is a near-copy of a real customer and the rare fraud…
Deep End Era. Engineering with SankalpThe Programme That Seemed to Make People Worse: Graphical Models and Causal Inference
A fictional hospital's post-discharge phone programme appears to raise readmissions by 50 percent, and a readmission model agrees. Consultant geriatrician Dr…
Deep End Era. Engineering with SankalpThirty Winners and a Flat Line: Bandits and Online Experimentation
A fictional online grocer runs sixty A/B tests in a year, ships thirty one "winners" claiming 22 percent uplift, and sees revenue per visitor rise two percent…
Deep End Era. Engineering with SankalpThe Battery That Wore Itself Out: Classical Reinforcement Learning
A fictional grid battery's new RL trading agent beats the human-written rules by 18 percent in simulation by cycling the battery dozens of times a day, which…
Deep End Era. Engineering with SankalpThe Network That Learned Nothing: Neural Network Fundamentals
A fictional offshore wind maintainer's first neural network predicts "no failure" for every turbine, then outputs NaN. Reliability engineer Ines Carvalho and…
Deep End Era. Engineering with SankalpBrilliant, Just Brilliant: Natural Language Processing Before and Beyond Large Language Models
A fictional council's email triage system scores "Third week running my bin hasn't been collected. Brilliant. Just brilliant." as strongly positive, routes a…
Deep End Era. Engineering with SankalpTeaching Machines to See: Convolution, ImageNet, Adversarial Examples and the Apples That Were Bruised on Tuesdays
At the fictional Fenwick Orchards, an apple-grading network with 97% test accuracy starts rejecting sound fruit, but only after the light covers are cleaned…
Deep End Era. Engineering with SankalpThe Top of the List: Ranking, Learning to Rank, LambdaMART, Clicks and Ad Auctions
Orchard's new click model beats the old one on every classification metric, and makes search worse: fewer purchases, more reformulated queries. Leila's team…
Deep End Era. Engineering with SankalpThe System That Learns From Itself: Recommender Systems from GroupLens to Two Towers
Lantern's new music recommender has raised plays per session by eleven percent, and Tunde has a chart showing the number of artists reaching listeners has…
Deep End Era. Engineering with SankalpHas This Model Ever Seen Tomorrow? Time-Series Forecasting from Holt-Winters to Zillow Offers
The night before a record heatwave, Eastmarch Grid's new deep learning forecaster says the evening peak will be 9.1 gigawatts. Forecasting chief Mariam asks…