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Two phases in the rapid prototyping process provide the ability Knives & Tools to facilitate the design of high-quality software. During the first prototyping phase basic functionality is explored, with the possibility of radically different design alternatives Wholesale Watch still being possible. This first phase of prototyping will culminate with an initial design proposal. The prototype is the tested, with design modifications being made on the basis of the results. Any radical product design changes would be made during this first phase. Following this, the second phase of prototyping is a fine-tuning stage with a slow cycle time. The question of how well a design fits the user's needs can be resolved by prototyping. Through rapid prototyping designers obtain information from users about the systems necessary functionality, user assistance needs, an optimum sequence of operations, and the appearance of the user interface. Whatever the tasks the users wish to perform (task analysis, information-gathering, etc), it is important that the proposed system have the necessary functionality. Information about the sequence of operations can tell the designers what users need to interact successfully with the system An outcome of the rapid prototyping process must be a system that provides both high functionality and ease of use. The charge of molding compound material can initially be in any of several forms, including powder Quad Band Cell Phones or pellets, liquid, or pre-form. To achieve consistency from part to part in the production molding, precise control of the amount of polymer is necessary. Typically the charge is heated before placement into the mold: The polymer is thereby softened, facilitating a shortening of the molding production cycle. This pre-heating can be accomplished using infrared heaters or convection heating in an oven. Alternatively, the use of a heated rotating screw in a barrel (an aspect of injection molding) can both pre-heat the polymer and meter the amount of the plastic charge to go into the mold. The plastic melting and cooling process is integral to the use of thermoplastic materials. At room temperature thermoplastic materials (polypropylene, nylon and PET etc) are solid. For such a plastic to be transformed into the desired shape it must first be heated to a molten state. When molten, it can be processed (via extrusion, injection molding, etc) into a desired shape. Once formed the plastic must cool so it can solidify. Heat must be removed from the molten plastic, and for this to happen the mold itself must be cooled. This may be accomplished by the mold being in contact with a solid heat sink, or by a flow of coolant through the mold.