In addition, the software can detect the sensor serial number and store this in the set-up parameters so that change of sensor can be detected before a measurement is started (e.g., wrong sensor connected to a channel). Allowing semiautomatic channel parameterization and system security as the correct calibrated value will automatically be used.
e.Īt the most basic level sensor type, serial number and sensitivity are stored. Lag time t L is the time difference between the end of the shutting in that generates the pressure pulse and the time when the pressure pulse reaches its peak. c.ĭraw a vertical line downwards from the tangential point until intersecting the common tangent the height from the tangential point to the intersection with the common tangent is the pressure pulse amplitude-pulse amplitude for short. Shut-in stimulation period Δ t p is duration of the shut-in section of the pulse period as shown in Figure 6.23. Pulse period is the whole duration of the stimulation process mentioned earlier, that is, the whole duration of the pressure pulse-one shut in and one flow of the active well. The following characteristic quantities can then be obtained: a. Then draw a vertical line through the tangential point at the wave peak. Definitions of symbols in pulse test graph analysis (Kamal method).ĭraw the common tangent of the two wave troughs and then draw a tangent paralleling to the common tangent at the wave peak. If material availability causes a change in the middle of an order, the order number is typically modified.įigure 6.23. They usually identify the unit with the order number and use the ship date of the order for warranty control. Thus, a non-interchangeable change affects all of an order, and all higher order numbers. Make-to-order and engineer-to-order environments typically trace changes to the order. Log the incorporated engineering change orders (ECOs) into a traveler (with each unit) and capture the SN/ECO relationship when the SN is assigned.
This method is used with or without a mod or version number. Use of a manufacturing control number with later assignment of the serial number.
Analysis of the best point in the manufacturing process to assign serial numbers may lead to: 1.Įarly assignment and use of a modifier to overcome the serial number effective “mix” problem, that is, units with a change are mixed up in the production process. All the factors discussed earlier need to be considered, as well as other factors, such as correlating test data to an individual unit. There are several trade-offs that CM and manufacturing need to consider and agree upon with regard to when the serial number is assigned, and how changes will be tracked. The manufacturing organization may have to assign a control number to, or have a “traveler” record with, each product in order to trace non-interchangeable changes to a serial, which is assigned later in the production process. This letter should be reflected on a released document – the nameplate drawing or a separate document referenced on the nameplate drawing. CM must assure that all necessary parties agree to and are aware of the assignment of such serial number blocks.Īn alternate method is to have each plant prefix the serial with a letter assigned by CM. At this point, the blocks of serials used by each plant must be controlled in order to avoid duplication. Manufacturing normally assigns the serial numbers to each product.Īs companies grow, they may decide to build products in the same family in more than one plant. They are usually assigned in sequence per product or product family. The serial number is sometimes used only for warranty control and sometimes used for both warranty control and for version control. Watts, in Engineering Documentation Control Handbook, 2012 Serial NumbersĪ serial number (SN) is a number assigned to each individual product in order to distinguish that product from all others.