The phrase "and then formulated" is correct and usable in written English.
It can be used when describing a sequence of actions where something was created or developed after a previous step.
Example: "After gathering all the necessary data, the team analyzed the results and then formulated a comprehensive report."
Alternatives: "and subsequently developed" or "and then created".
So they drew up holiday shopping lists, calculated the cost and then formulated the most logical plan they could conceive to bridge the gap between savings and spending: they hoped to stumble across a cache of unnoticed cash.
Theophrastus, we are informed, cited a tenet of Plato's and then formulated 'the objections' against it.
The constitutive equations are geometrically linearized in the neighborhood of predeformation and then formulated for incompressible materials.
A series of parameters which influence the efficiency coefficient and effectiveness coefficient are identified and then formulated to quantify those coefficients for optimal design.
In this study, we have investigated this assumption quantitatively, based on a detailed analysis of stresses and other parameters in the convective cell, and then formulated the critical conditions for subduction initiation.
Ref. [11] proposed a phytoplankton fish model with ISFC and then formulated an optimal control problem (OCP, for short) and strived to find the appropriate harvesting rates to maximize the cost function in an impulsive period.
In Section 2, we first recall the formulation of general FBSDEP and then formulate the eigenvalue problem for stochastic Hamiltonian systems driven by Poisson process.
That is, it formulates hypotheses from observations, conducts experiments to test them, and then formulates new hypotheses from the results.
Consider the evidence and then formulate a policy paper designed to ensure that ships from all nations are recycled in a safe manner.
His improbable survival has become one of those legendary stories of insight, like Archimedes shouting "Eureka!" when he saw his bathwater rise, or Isaac Newton watching an apple fall from a tree and then formulating his theory of gravity.
