Sabit's Professional Knowledge Book
Professional Knowledge Book
A professional knowledge system for materials, maintenance, procurement and data: the business problem, the decision rule, the professional judgement and the experience behind it.
Business problemDecision ruleProfessional judgementDecision LabExperience
- 10
- articles
- 6
- chapters
- 4
- with formulas
- 6
- Decision Labs
Sort: By chapter Recently published
Browse by tag
Alternatives Bid evaluation BOM Cataloguing Certificates Corrosion Critical spares Data quality Decision making Demand review Excess stock Fit-for-use Governance KPI Lead time Lifecycle Maintenance readiness Material master Min-Max MTBF MTTR Obsolescence Power BI Preservation Reliability Reorder point Reporting Reservations Safety stock SAP Slow-moving stock Storage TCO Technical evaluation
Start here
Excess Prevention Before Purchase
A purchase decision should consider available stock, open supply, reservations and the maximum stock level, not PR quantity alone.
Inventory control · Demand review
Decision LabFormula6 min read
Technical Evaluation Decision Chain
A recommendation is stronger when every decision can be traced from requirement to bidder evidence, clarification and final outcome.
Technical evaluation · Procurement governance
Decision Lab4 min read
Preservation as an Operational Risk Control
Stored material is only valuable if it remains identifiable, protected, documented and fit for use when maintenance needs it.
Storage readiness · Risk control
Decision Lab4 min read
Materials Management
Min-Max, safety stock, reorder point, excess, slow-moving and dead stock, critical spares and availability.
Excess Prevention Before Purchase
A purchase decision should consider available stock, open supply, reservations and the maximum stock level, not PR quantity alone.
Inventory control · Demand review
Decision LabFormula6 min read
Reorder Point
Reorder point links demand during replenishment lead time with the protection provided by safety stock.
Inventory planning · MRO spares
Decision LabFormula5 min read
Obsolescence and Alternative Material Logic
Obsolescence is not only a purchasing problem. It is a lifecycle risk linking equipment, stock, technical equivalence and future maintenance demand.
Lifecycle management · Technical equivalence
Decision Lab5 min read
Maintenance Materials
Planned and corrective demand, turnaround materials, criticality, readiness, spare-parts strategy and equipment BOM.
Availability, MTBF and MTTR
Materials readiness influences maintenance performance because an unavailable spare can turn a repair task into extended downtime.
Reliability · Maintenance materials
Formula5 min read
Procurement
Technical and bid evaluation, supplier evaluation, framework agreements, expediting and total cost of ownership.
Total Cost of Ownership
The cheapest quotation is not always the lowest-cost decision over the full lifecycle.
Procurement · Lifecycle cost
Formula4 min read
Technical Evaluation Decision Chain
A recommendation is stronger when every decision can be traced from requirement to bidder evidence, clarification and final outcome.
Technical evaluation · Procurement governance
Decision Lab4 min read
SAP / Data
SAP PM and MM, material master, BOM, cataloguing, noun-modifier, duplicates, master-data quality and SPIL.
Data Is a Signal, Not the Decision
SAP gives critical transactional context, but professional judgement is needed to interpret whether a material requirement should be purchased, transferred, held or challenged.
Decision governance · SAP data
4 min read
Material Data Must Connect to Equipment
A technically correct spare part loses value when its description, manufacturer and part number, UoM or equipment linkage is incomplete.
Master data · BOM · Cataloguing
4 min read
Preservation
Preservation, storage conditions, shelf life, corrosion risk, packaging and fit-for-use.
Preservation as an Operational Risk Control
Stored material is only valuable if it remains identifiable, protected, documented and fit for use when maintenance needs it.
Storage readiness · Risk control
Decision Lab4 min read
Management & Governance
KPI, RACI, governance, process improvement, risk, workflow design, digitalisation and continuous improvement.
Visibility Changes Behaviour
Dashboards are useful when they convert backlog, stock, procurement and readiness signals into ownership and action.
Management governance · KPI
4 min read
Decision Labs
Illustrative scenarios where you choose a decision and compare it with a professional review. Not a test: there is no score, only reasoning.
- L01Excess preventionThe calculation shows stock above the maximum. What would you check before changing the open supply?In the article Excess Prevention Before Purchase
- L02Reorder point settingThe formula gives a number. Should that number go into the system?In the article Reorder Point
- L03Technical evaluationBidder B offers an alternative. Can it be accepted technically?In the article Technical Evaluation Decision Chain
- L04Material acceptanceThe material has arrived. Can it be accepted for use?Connected case: Material Acceptance and Governance
- L05Preservation readinessSAP says available. Is it ready for maintenance use?In the article Preservation as an Operational Risk Control
- L06Obsolescence and alternativeThe OEM part is obsolete. Is the proposed replacement supported?In the article Obsolescence and Alternative Material Logic