This paper presents SCHEMA (Structured Components for Harmonized Engineered Modular Architecture), a structured prompt engineering methodology specifically developed for Google Gemini 3 Pro Image. Unlike generic prompt guidelines or model-agnostic tips, SCHEMA is an engineered framework built on systematic professional practice encompassing 850 verified API predictions within an estimated corpus of approximately 4,800 generated images, spanning six professional domains: real estate photography, commercial product photography, editorial content, storyboards, commercial campaigns, and information design. The methodology introduces a three-tier progressive system (BASE, MEDIO, AVANZATO) that scales practitioner control from exploratory (approximately 5%) to directive (approximately 95%), a modular label architecture with 7 core and 5 optional structured components, a decision tree with explicit routing rules to alternative tools, and systematically documented model limitations with corresponding workarounds. Key findings include an observed 91% Mandatory compliance rate and 94% Prohibitions compliance rate across 621 structured prompts, a comparative batch consistency test demonstrating substantially higher inter-generation coherence for structured prompts, independent practitioner validation (n=40), and a dedicated Information Design validation demonstrating >95% first-generation compliance for spatial and typographical control across approximately 300 publicly verifiable infographics. Previously published on Zenodo (doi:10.5281/zenodo.18721380).

翻译：本文提出了SCHEMA（结构化组件协调工程模块化架构），这是一种专门为Google Gemini 3 Pro Image开发的结构化提示工程方法。与通用的提示指南或模型无关的建议不同，SCHEMA是一个建立在系统性专业实践基础上的工程化框架，其依据涵盖了约4,800张生成图像语料库中的850个已验证API预测，涉及六个专业领域：房地产摄影、商业产品摄影、编辑内容、故事板、商业活动以及信息设计。该方法引入了一个三层渐进系统（基础、中级、高级），可将从业者的控制范围从探索性（约5%）扩展到指令性（约95%）；一个包含7个核心和5个可选结构化组件的模块化标签架构；一个带有明确路由规则至替代工具的决策树；以及系统记录的模型局限性及相应解决方案。关键发现包括：在621个结构化提示中，观察到91%的强制性规则遵从率和94%的禁止性规则遵从率；一项比较性批次一致性测试表明，结构化提示在代际间具有显著更高的连贯性；独立的从业者验证（n=40）；以及一项专门的信息设计验证表明，在约300个可公开验证的信息图表中，对于空间和排版控制的首代遵从率超过95%。本文先前发表于Zenodo（doi:10.5281/zenodo.18721380）。