Where does sandbox collide?

A shallow tray of sand in which a child builds scenes with miniature figures, used to observe and work with feelings the child cannot easily put into words. Lowenfeld's 1939 The World Pictures of Children introduced the method, letting children make small worlds in a box of sand so that their arrangements could be recorded and studied. Kalff's 1980 Sandplay: A Psychotherapeutic Approach to the Psyche developed it into a structured therapy. Here the referent is a physical play space and the scene made within it, and it has nothing to do with an isolated place to run computer code or a supervised scheme for testing new financial products.[1][2]

Unit

One child's completed sand scene, described by the figures placed and how they are arranged

Recovery means

Not applicable

Measured by

Recorded by photographing or noting the layout, the figures chosen, and their placement over one or more sessions

A restricted execution environment that lets a program run while blocking it from touching memory, files, or system calls outside a fenced boundary, so that faulty or hostile code cannot damage the rest of the machine. Wahbe, Lucco, Anderson, and Graham's 1993 Efficient Software-Based Fault Isolation coined the word sandboxing for a technique that masks a module's addresses to keep it inside its own region. Goldberg, Wagner, Thomas, and Brewer's 1996 A Secure Environment for Untrusted Helper Applications extended it to confine whole untrusted programs by filtering their system calls. Here the referent is an engineered boundary around running software, and it is not a tray of sand for a child nor a regulatory testing scheme.[3][4]

Unit

One confined process or module, described by the boundary it may not cross

Recovery means

Not applicable

Measured by

Assessed by the set of resources the confined code can and cannot reach, and by the runtime cost the confinement adds

A time-limited program in which a regulator lets a firm trial a new product or service with real customers under close supervision and eased requirements, so that both sides can learn before full rules apply. The UK Financial Conduct Authority's 2015 report Regulatory Sandbox launched the first such scheme for financial innovation. Zetzsche, Buckley, Arner, and Barberis's 2017 Regulating a Revolution: From Regulatory Sandboxes to Smart Regulation analysed how the approach spread and where it fits among regulatory tools. Here the referent is a supervised legal and administrative arrangement between a regulator and a firm, and it is neither a child's play tray nor a fenced place to run software.[5][6]

Unit

One firm's supervised trial admitted to the scheme, bounded by its conditions and time limit

Recovery means

Not applicable

Measured by

Tracked by the conditions and duration set for each admitted firm and by the outcomes reported when the trial ends