TCP/IP Layered Architecture

Time-temperature indicators (TTIs) are devices or smart labels that visually show the cumulative time-temperature history of a product. They change appearance, often through a color change, when the product has been exposed to temperature conditions that could compromise its safety or quality. This provides a more accurate, dynamic indication of remaining shelf life than a static printed date label.

A core TRIZ toolset for resolving technical contradictions, where improving one system parameter worsens another: the 40 principles are generic inventive strategies derived from patent analysis while the Contradiction Matrix is a table that maps standard engineering parameters against each other, suggesting which of the 40 principles are most likely to provide a solution for a specific conflict.

Compressed Air Energy Storage (CAES) is a method to store energy generated at one time for use at another time. At a utility scale, energy is stored by compressing air and storing it in an underground reservoir, such as a salt cavern. When electricity is needed, the pressurized air is heated and expanded in a turbine, driving a generator.

Total Quality Management (TQM) is a management philosophy where all members of an organization participate in improving processes, products, services, and the culture in which they work. It aims for long-term success through customer satisfaction. TQM integrates quality-discipline into the culture and activities of a company, moving beyond simple product inspection to a holistic, organization-wide approach.

Time-of-Flight Diffraction (TOFD) is a highly accurate ultrasonic technique for flaw detection and sizing. It uses separate transmitting and receiving probes. Instead of measuring the amplitude of a strong reflection from the face of a flaw, TOFD measures the arrival time of the much weaker waves diffracted from the flaw's upper and lower tips, enabling precise through-wall size measurement.

The C-rate is a standardized measure of the rate at which a battery is charged or discharged relative to its nominal capacity. A rate of 1C means the current will fully charge or discharge the battery in one hour. Higher C-rates (e.g., 5C) indicate faster charging/discharging (12 minutes), while lower rates (e.g., C/2) indicate slower processes (2 hours).

Bulk micromachining is a subtractive fabrication process that creates MEMS structures by selectively etching into a substrate, typically a silicon wafer. It uses wet or dry etching techniques to sculpt the bulk material. Anisotropic etchants like potassium hydroxide (KOH) are common, as they etch different crystal planes of silicon at different rates, enabling the creation of precise V-grooves and cavities.

The Buying Center is a model representing all individuals and groups within an organization who participate in a purchase decision. It's not a fixed unit but a set of roles assumed by different people for different purchases. These roles include initiators, users, influencers, deciders, approvers, buyers, and gatekeepers, each impacting the final decision through their specific function and authority.

A design methodology where 'X' represents a specific product life cycle objective. DFX encompasses a collection of guidelines and techniques aimed at optimizing a product's design for a particular goal, such as manufacturability (DFM), assembly (DFA), reliability (DFR), or sustainability (DfS). This proactive approach addresses potential issues early in the design phase, reducing costs and improving quality.

To address the inability of different CAD systems to share data, neutral file formats were created. The Initial Graphics Exchange Specification (IGES), developed in the late 1970s, was an early attempt. It was later superseded by the more robust and comprehensive STEP (Standard for the Exchange of Product model data, ISO 10303), which can represent full 3D models, assembly structure, and metadata.