https://zionn.io/blog/ What we have learned shipping custom software, migrating legacy systems, and putting AI to work where it earns its keep. en-US hi@zionn.io (ZIONN) https://zionn.io/blog/llm-in-production-confidence-thresholds/ https://zionn.io/blog/llm-in-production-confidence-thresholds/ Where the confidence threshold goes, what human review has to catch, and which decisions a language model should never be allowed to own in production. Thu, 30 Jul 2026 03:00:00 GMT ZIONN Engineering llm production human-in-the-loop operations https://zionn.io/blog/strangler-fig-modernization/ https://zionn.io/blog/strangler-fig-modernization/ How to replace a legacy system in slices while it keeps running, which slice to take first, and the three conditions that make the pattern fail in practice. Thu, 30 Jul 2026 03:00:00 GMT ZIONN Engineering legacy migration architecture strangler-fig https://zionn.io/blog/two-week-discovery-deliverables/ https://zionn.io/blog/two-week-discovery-deliverables/ A discovery that produces a proposal is a sales process. Five artifacts that make it an engineering deliverable you own and can hand to any vendor. Thu, 30 Jul 2026 03:00:00 GMT ZIONN Engineering discovery scoping architecture procurement https://zionn.io/blog/legacy-erp-anticorruption-layer/ https://zionn.io/blog/legacy-erp-anticorruption-layer/ An anticorruption layer lets new systems talk to an untouchable ERP without inheriting its data model. What belongs in it, and how to keep it thin. Wed, 29 Jul 2026 03:00:00 GMT ZIONN Engineering erp integration legacy architecture https://zionn.io/blog/rpa-vs-api-integration/ https://zionn.io/blog/rpa-vs-api-integration/ Screen automation is fast to build and expensive to keep. A decision table for choosing between RPA and a real integration, and how to survive RPA. Wed, 29 Jul 2026 03:00:00 GMT ZIONN Engineering rpa automation integration operations https://zionn.io/blog/build-vs-buy/ https://zionn.io/blog/build-vs-buy/ Off-the-shelf is cheaper until you count configuration, integration, and the processes you bend to fit it. A test for deciding which side a capability falls on. Tue, 28 Jul 2026 03:00:00 GMT ZIONN Engineering build-vs-buy procurement architecture cost https://zionn.io/blog/custom-software-cost-framework/ https://zionn.io/blog/custom-software-cost-framework/ A framework for estimating custom software cost from the factors that actually move it, so you can challenge a proposal instead of comparing headline totals. Tue, 28 Jul 2026 03:00:00 GMT ZIONN Engineering cost estimation procurement scoping https://zionn.io/blog/etl-vs-elt/ https://zionn.io/blog/etl-vs-elt/ ELT is the default advice and it is not always right. Where each pattern belongs, what the warehouse bill hides, and the constraint that decides it for you. Tue, 28 Jul 2026 03:00:00 GMT ZIONN Engineering etl elt data-pipelines warehouse https://zionn.io/blog/evaluating-engineering-depth/ https://zionn.io/blog/evaluating-engineering-depth/ Case studies and team bios do not distinguish vendors. Six questions that surface real engineering depth, and the answers that should end the conversation. Mon, 27 Jul 2026 03:00:00 GMT ZIONN Engineering procurement vendor-evaluation engineering due-diligence https://zionn.io/blog/hipaa-business-associate-agreement/ https://zionn.io/blog/hipaa-business-associate-agreement/ A signed BAA is not a compliance certificate. What it commits your software vendor to, what it does not cover, and the questions to ask before signing one. Mon, 27 Jul 2026 03:00:00 GMT ZIONN Engineering hipaa baa compliance healthcare https://zionn.io/blog/hipaa-technical-safeguards-checklist/ https://zionn.io/blog/hipaa-technical-safeguards-checklist/ The Security Rule technical safeguards written as engineering decisions: what each one requires, what satisfies it, and where teams usually fall short. Mon, 27 Jul 2026 03:00:00 GMT ZIONN Engineering hipaa security checklist healthcare https://zionn.io/blog/nearshore-offshore-onshore-cost/ https://zionn.io/blog/nearshore-offshore-onshore-cost/ Hourly rate is the smallest term in delivery cost. What time zone overlap, rework, and context loss actually cost, and when each model is the right choice. Mon, 27 Jul 2026 03:00:00 GMT ZIONN Engineering outsourcing cost delivery teams