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[[Image:case PEEC LTU.png|thumb|right|200px|A 19x43x38 cm (LxWxT) case with one opening (19x10) in the front is modeled in the time ___domain.]]
'''Partial element equivalent circuit method (PEEC)''' is partial [[inductance]] calculation used for interconnect problems from early 1970s which is used for numerical modeling of [[Electromagnetism|electromagnetic]] (EM) properties. The transition from a design tool to the full wave method involves the [[capacitance]] representation, the inclusion of time retardation and the dielectric formulation. Using the PEEC method, the problem will be transferred from the electromagnetic ___domain to the circuit ___domain where conventional SPICE-like circuit solvers can be employed to analyze the equivalent circuit. By having the PEEC model one can easily include any electrical component e.g. passive components, sources, non-linear elements, ground, etc. to the model. Moreover, using the PEEC circuit, it is easy to exclude capacitive, inductive or resistive effects from the model when it is possible, in order to make the model smaller. As an example, in many application within power electronics, the magnetic field is a dominating factor over the electric field due to the high current in the systems. Therefore, the mode can be simplified by just neglecting capacitive couplings in the model which can simply be done by excluding the capacitors from the PEEC model.
Numerical modeling of electromagnetic properties are used by, for example, the electronics industry to:
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