https://www.meantimetolearn.com/en/ Observability, from signal to decision: latest publications. en https://www.meantimetolearn.com/en/business/product-owner-guide/ https://www.meantimetolearn.com/en/business/product-owner-guide/ Fri, 02 Oct 2026 00:00:00 GMT The questions a business or product owner can ask of observability, what the engineering team must set up to answer them, how to turn a customer promise into an SLO and where to stand during incidents. https://www.meantimetolearn.com/en/diagrams/ai-layers/ https://www.meantimetolearn.com/en/diagrams/ai-layers/ Fri, 02 Oct 2026 00:00:00 GMT A generative AI application in exploded view: data, infrastructure, model, orchestration, application. Rotate the stack, open each layer to see what it is, what can go wrong and what to observe, then send a request through all five. https://www.meantimetolearn.com/en/diagrams/executive-dashboard/ https://www.meantimetolearn.com/en/diagrams/executive-dashboard/ Fri, 02 Oct 2026 00:00:00 GMT Five indicators, three colors, a systematic comparison and a path down to the technical detail: an executive committee dashboard to explore, on fictional data. https://www.meantimetolearn.com/en/diagrams/hpc-cluster/ https://www.meantimetolearn.com/en/diagrams/hpc-cluster/ Fri, 02 Oct 2026 00:00:00 GMT Slurm scheduler, nodes of 8 H100 GPUs, NVLink, InfiniBand NDR, parallel storage: click each element to see what it is, what to observe there and what threatens it, then play a training step with or without a straggler. https://www.meantimetolearn.com/en/diagrams/layers/ https://www.meantimetolearn.com/en/diagrams/layers/ Fri, 02 Oct 2026 00:00:00 GMT Seven layers, from the shop-floor sensor to the AI model, and two cross-cutting bands: what you observe at each level, with which signals, indicators and tools. https://www.meantimetolearn.com/en/organization/platform-team-model/ https://www.meantimetolearn.com/en/organization/platform-team-model/ Fri, 02 Oct 2026 00:00:00 GMT Platform team, center of excellence or federated model: decide who builds, who owns and who pays for observability, with a split of responsibilities and criteria for changing models. https://www.meantimetolearn.com/en/organization/telemetry-governance/ https://www.meantimetolearn.com/en/organization/telemetry-governance/ Fri, 02 Oct 2026 00:00:00 GMT Data contracts checked in continuous integration, cardinality budgets, retention by signal class and a quarterly review: decide what gets collected before the bill or the auditor decides for you. https://www.meantimetolearn.com/en/people/blameless-postmortem/ https://www.meantimetolearn.com/en/people/blameless-postmortem/ Fri, 02 Oct 2026 00:00:00 GMT Trigger, prepare and facilitate a post-mortem that produces actions rather than culprits, then follow those actions through and measure what the organization learns. https://www.meantimetolearn.com/en/people/sustainable-on-call/ https://www.meantimetolearn.com/en/people/sustainable-on-call/ Fri, 02 Oct 2026 00:00:00 GMT Size a rotation, measure alert load, compensate people and only page a human for a symptom that threatens an SLO. https://www.meantimetolearn.com/en/technical/observability-in-10-minutes/ https://www.meantimetolearn.com/en/technical/observability-in-10-minutes/ Fri, 02 Oct 2026 00:00:00 GMT Monitoring and observability, the signals (metrics, logs, traces, profiles, events), how they are correlated and what cardinality is, explained on a single example: a slow payment. https://www.meantimetolearn.com/en/technical/opentelemetry-end-to-end/ https://www.meantimetolearn.com/en/technical/opentelemetry-end-to-end/ Fri, 02 Oct 2026 00:00:00 GMT What OpenTelemetry is and the journey of a span: instrumentation, SDK, OTLP protocol, Collector, storage. With a Python instrumentation and a minimal Collector configuration. https://www.meantimetolearn.com/en/technical/slo-and-alerting/ https://www.meantimetolearn.com/en/technical/slo-and-alerting/ Fri, 02 Oct 2026 00:00:00 GMT SLI, SLO and SLA in plain words, the error budget and how to compute it, alerting on symptoms and multi-window burn rate alerts, then how to choose a first SLO. https://www.meantimetolearn.com/en/tools/nis2-evidence/ https://www.meantimetolearn.com/en/tools/nis2-evidence/ Fri, 02 Oct 2026 00:00:00 GMT The ten measures of NIS2 Article 21, the evidence telemetry can provide for each, your status and a prioritized action plan. https://www.meantimetolearn.com/en/tools/raci/ https://www.meantimetolearn.com/en/tools/raci/ Fri, 02 Oct 2026 00:00:00 GMT Twelve activities, seven roles: build your RACI, check it has exactly one accountable owner and at least one responsible per line, spot bottlenecks, export it. https://www.meantimetolearn.com/en/tools/vendor-scorecard/ https://www.meantimetolearn.com/en/tools/vendor-scorecard/ Fri, 02 Oct 2026 00:00:00 GMT Compare up to three observability solutions on six weighted criteria, with the same requirements for SaaS, open source and hybrid, and spot eliminating scores. https://www.meantimetolearn.com/en/training/it-governance/ https://www.meantimetolearn.com/en/training/it-governance/ Fri, 02 Oct 2026 00:00:00 GMT Business case, compliance, governance, FinOps, people transformation and steering: what a CIO needs to be able to do to take observability to the executive committee. https://www.meantimetolearn.com/en/training/it-governance/01-business-case/ https://www.meantimetolearn.com/en/training/it-governance/01-business-case/ Fri, 02 Oct 2026 00:00:00 GMT Put a figure on the real cost of incidents with management control, calculate the return on investment and the payback period, total the full cost, present scenarios. https://www.meantimetolearn.com/en/training/it-governance/02-compliance/ https://www.meantimetolearn.com/en/training/it-governance/02-compliance/ Fri, 02 Oct 2026 00:00:00 GMT NIS2, DORA, CRA, AI Act and GDPR from the CIO's point of view: a verified timeline, what each text expects from observability, the common evidence foundation and CIO, CISO and DPO governance. https://www.meantimetolearn.com/en/training/it-governance/03-governance-roadmap/ https://www.meantimetolearn.com/en/training/it-governance/03-governance-roadmap/ Fri, 02 Oct 2026 00:00:00 GMT A four-phase roadmap, a co-built RACI, a choice between self-managed, SaaS and hybrid made with the same criteria, a solution evaluation grid and six CIO anti-patterns. https://www.meantimetolearn.com/en/training/it-governance/04-finops/ https://www.meantimetolearn.com/en/training/it-governance/04-finops/ Fri, 02 Oct 2026 00:00:00 GMT Understand why the bill drifts, read a bill line by line, pull the technical and contractual levers, and set up governance that prevents silent doubling. https://www.meantimetolearn.com/en/training/it-governance/05-people-culture/ https://www.meantimetolearn.com/en/training/it-governance/05-people-culture/ Fri, 02 Oct 2026 00:00:00 GMT Support the roles that are changing, recognize four archetypes, establish the blameless post-mortem, run a sustainable on-call rotation, treat the platform as a product, recruit and retain. https://www.meantimetolearn.com/en/training/it-governance/06-steering/ https://www.meantimetolearn.com/en/training/it-governance/06-steering/ Fri, 02 Oct 2026 00:00:00 GMT Translate the technical into executive indicators, design a dashboard that can be read in two minutes, assess AIOps without illusions, lead change with ADKAR, and spot the weak signals of a project in trouble. https://www.meantimetolearn.com/en/training/it-governance/07-comex-toolkit/ https://www.meantimetolearn.com/en/training/it-governance/07-comex-toolkit/ Fri, 02 Oct 2026 00:00:00 GMT The five-slide pitch, ten common objections and how to answer them, sixty questions to ask yourself, a war room simulation and the course's running exercise. https://www.meantimetolearn.com/en/training/it-governance/quiz/ https://www.meantimetolearn.com/en/training/it-governance/quiz/ Fri, 02 Oct 2026 00:00:00 GMT Ten questions to check what you retain from the CIO course: business case, compliance, governance, FinOps, people and steering. https://www.meantimetolearn.com/en/diagrams/architecture/ https://www.meantimetolearn.com/en/diagrams/architecture/ Thu, 01 Oct 2026 00:00:00 GMT An example self-hostable observability stack, component by component: role, flows, meta-observability, minimal configuration, pitfalls and owners. https://www.meantimetolearn.com/en/diagrams/collector-pipeline/ https://www.meantimetolearn.com/en/diagrams/collector-pipeline/ Thu, 01 Oct 2026 00:00:00 GMT Metrics, traces and logs flow through the Collector's processors: turn one off and watch live what reaches storage, with the matching YAML configuration. https://www.meantimetolearn.com/en/diagrams/trace-explorer/ https://www.meantimetolearn.com/en/diagrams/trace-explorer/ Thu, 01 Oct 2026 00:00:00 GMT Three OpenTelemetry traces to walk span by span: a nominal RAG agent, the same agent failing silently, and a slowed-down e-commerce payment. https://www.meantimetolearn.com/en/diagrams/training-step/ https://www.meantimetolearn.com/en/diagrams/training-step/ Thu, 01 Oct 2026 00:00:00 GMT Eight GPUs, five phases, a ring AllReduce and a barrier: slow one GPU down and watch the others wait while reported utilization stays high. https://www.meantimetolearn.com/en/tools/alert-fatigue/ https://www.meantimetolearn.com/en/tools/alert-fatigue/ Thu, 01 Oct 2026 00:00:00 GMT Alert volume, noise share, night wake-ups, rotation size: estimate the real load of an on-call week, its cost and whether it is sustainable. https://www.meantimetolearn.com/en/tools/cardinality/ https://www.meantimetolearn.com/en/tools/cardinality/ Thu, 01 Oct 2026 00:00:00 GMT Add or remove labels on a metric and watch active series, memory and cost jump orders of magnitude. https://www.meantimetolearn.com/en/tools/collector-cost/ https://www.meantimetolearn.com/en/tools/collector-cost/ Thu, 01 Oct 2026 00:00:00 GMT Measure volumes, and with your prices the observability bill, before and after Collector levers: unbounded labels, aggregation, tail sampling, log filtering and routing. https://www.meantimetolearn.com/en/tools/error-budget/ https://www.meantimetolearn.com/en/tools/error-budget/ Thu, 01 Oct 2026 00:00:00 GMT Set an SLO, simulate an incident, watch the error budget being consumed and multi-window burn rate alerts firing. https://www.meantimetolearn.com/en/tools/mttr-business-case/ https://www.meantimetolearn.com/en/tools/mttr-business-case/ Thu, 01 Oct 2026 00:00:00 GMT What are faster detection and restoration worth? Incident cost before and after, return on investment, payback period and sensitivity to assumptions. https://www.meantimetolearn.com/en/tools/quality-slo/ https://www.meantimetolearn.com/en/tools/quality-slo/ Thu, 01 Oct 2026 00:00:00 GMT Check whether a quality SLO is demonstrated on a sample: Wilson interval, verdict against the target and required sample size. https://www.meantimetolearn.com/en/tools/straggler/ https://www.meantimetolearn.com/en/tools/straggler/ Thu, 01 Oct 2026 00:00:00 GMT A synchronous training step lasts as long as its slowest GPU: measure the lost efficiency, the wasted GPU-hours and the gap between reported utilization and useful compute. https://www.meantimetolearn.com/en/tools/tail-sampling/ https://www.meantimetolearn.com/en/tools/tail-sampling/ Thu, 01 Oct 2026 00:00:00 GMT Compare tail sampling and head sampling at equal volume: traces kept, storage, cost, Collector memory and share of errors retained. https://www.meantimetolearn.com/en/technical/llm-rag-mcp/ https://www.meantimetolearn.com/en/technical/llm-rag-mcp/ Thu, 20 Aug 2026 00:00:00 GMT Deployment playbooks for an open source stack to observe an LLM system: inference, retrieval (RAG) and tools (MCP). https://www.meantimetolearn.com/en/technical/audit-log-integrity/ https://www.meantimetolearn.com/en/technical/audit-log-integrity/ Thu, 16 Jul 2026 00:00:00 GMT What a signature proves, what it does not prove and how to build an audit log that a third party can verify.