Where does coordination collide?

The organizing of interdependent activities so that separate people, tasks, and resources fit together into coherent joint work: coordination is the management of the dependencies that arise when what one activity does affects what another can do. Malone and Crowston's 1994 The interdisciplinary study of coordination defined it as managing dependencies among activities and catalogued the mechanisms, such as shared resources, task assignment, and producer and consumer links, that groups use to keep such work fitting together. The referent is a property of how work is arranged among people and tasks, judged by how smoothly the parts mesh, not a game between rational players, a metal bonded to ligands, or the timing of muscles in a limb.[1]

Unit

A set of managed dependencies among activities, described by the mechanisms that link them

Recovery means

Not applicable

Measured by

Assessed by process cost, delay, rework, and how well interdependent tasks fit together in practice

A strategic situation in which players do better by matching their choices than by choosing independently, so the problem is not a clash of interests but reaching a shared expectation about what everyone will do. Schelling's 1960 The Strategy of Conflict analysed such coordination games and showed that people often converge on a focal point, an option that stands out enough to let each player guess what the others will pick. The referent is a structure of incentives and mutual expectations among decision makers, studied through equilibria and focal points, not the arranging of work in an organization, a chemical complex, or the control of movement.[2]

Unit

A game whose payoffs reward matching choices, described by its equilibria

Recovery means

Not applicable

Measured by

Analysed by locating equilibria and focal points, and tested in experiments on how players actually converge

A compound built around a central metal atom or ion to which a set of surrounding molecules or ions, called ligands, are bonded: the metal accepts electron pairs from the ligands, and the number of such attachments is its coordination number. Werner's 1893 Beitrag zur Konstitution anorganischer Verbindungen proposed that a metal has a secondary valence directed in space, which founded the modern theory of these complexes and later earned him a Nobel Prize. The referent is a defined chemical structure held together by bonds to a central atom, characterized by its geometry and coordination number, and it has nothing to do with arranging work, a strategic game, or the timing of muscles.[3]

Unit

A central metal atom with its bonded ligands, counted by coordination number

Recovery means

Ligands can exchange, and the complex can dissociate and re-form depending on conditions

Measured by

Determined by X-ray crystallography and spectroscopy, which fix the geometry, coordination number, and bonding

The organizing of many muscles, joints, and limb segments into a single smooth, purposeful movement: because the body has far more independently movable parts than any task strictly requires, the nervous system must constrain and combine them so they act as one. Bernstein's 1967 The co-ordination and regulation of movements framed this as the degrees-of-freedom problem, the challenge of mastering the body's redundant parts to produce reliable action. The referent is a biological control achievement in a moving body, studied through kinematics and movement variability, not the arranging of organizational work, a game among players, or a metal complex.[4]

Unit

A movement organized across muscles and joints, described by its kinematics

Recovery means

Coordination can be relearned and reorganized after injury or with practice

Measured by

Measured by kinematic smoothness, timing, and the variability of movement across repeated trials