From Luigi Moretti’s “Operational Research” through “Augmented Rationalism" to Contemporary Parametricism and the advent of Artificial Intelligence. Parametric thought

This article traces the intellectual lineage from Luigi Moretti’s post-war concept of “Operational Research” and “Parametric Architecture” to contemporary Parametricism and the advent of Artificial Intelligence (AI) in design. It posits that the current technological revolution in architecture is not an epistemological break but rather the culmination of a long-standing dialectic between art and science, rooted in historical Functionalism and theorised as early as the 1940s by Moretti.
The analysis begins by framing architecture as the applied art *par excellence*, tasked with reconciling aesthetic canons with physical and economic laws—a tension famously expressed by Ernesto N. Rogers’ equation, A = φ(U, B) (Architecture is a function of Utility and Beauty). Luigi Moretti’s seminal work is identified as the critical bridge, proposing a radical reconfiguration of the discipline through four pillars: a new parameterised language to overcome disciplinary incommunicability; a model of statistical “continuous perfectibility” over absolute truth; a new “rigorous intellectual morality” for the architect; and the enabling role of computational technology.
The paper argues that parametric thinking is a natural evolution of proto-parametric logics found in Rationalism, later crystallised in the works of Christopher Alexander and Makoto Sei Watanabe. Today, this evolution enters a new phase with AI and machine learning, which augment human design capacities by processing vast datasets and generating optimised solutions. However, this power revives critical debates around stylistic hegemony, the risk of neglecting architecture's social and cultural dimensions, and the ethical imperative to align machine goals with human values.
In conclusion, the integration of parametric AI tools is framed not as a replacement for human creativity but as its enhancement, demanding a renewed ethical commitment. The future lies in an “Augmented Functionalism” that leverages technology for efficiency and sustainability while remaining grounded in Rogers’ principle of continuity and Moretti’s call for an intellectual morality, ultimately striving to fulfil the enduring prophecy of an architecture that embodies “the utility of beauty and the beauty of utility.”