Engineering Talk - DCS's Blog on Quality and Engineering

5 Reasons You Need an SPC System

5 Reasons You Need an SPC System


SPC has traditionally been a tool of the large manufacturers, but with new technology, it is now available for smaller suppliers on the Cloud


SPC - Statistical Process Control - is not new. It has been used for decades to analyze parts and processes in manufacturing and make adjustments to reduce waste and defects. What is new are two things: the range of automation and software that supports SPC, and the ability to use it farther and farther down the supply chain. The tools are no longer massive systems that need hundreds of thousands of dollars and large teams to maintain, but Cloud based systems that can be set up quickly and used effectively, and affordably, by just a few users. 

This access to SPC promises cost savings at every level of the supply chain, and at many levels that have traditionally simply dealt with quality problems as a matter of doing business. 

With access to SPC available, why would you want to adopt an SPC system?

Here are five reasons why adopting an SPC system is a good idea: 

Topics: SPC Webinar QDM

Closed-loop Manufacturing at Jaguar Land Rover

Closed-loop manufacturing at Jaguar Land Rover

Originally published in Smart Industry Magazine -

Topics: CATIA 3DCS Tolerance Analysis SPC CATIA V6 Webinar QDM Siemens NX 3DCS Creo PTC Creo Global Technology Conference SOLIDWORKS GD&T

A Manufacturer's Guide to Understanding SPC Software and Vendors

A Manufacturer's Guide to Understanding SPC Software and Vendors

Knowing which vendor to work with to implement SPC is a difficult choice

Larger enterprises are beginning to deploy Statistical Process Control (SPC) software solutions independent of their investments in Manufacturing Execution Systems (MES), Enterprise Quality Management Software (EQMS) and Enterprise Resource Planning (ERP) systems.

Topics: SPC QDM

The Quality Show -- What Were Attendees Quality Issues Blocking SPC Adoption?


Attendees at The Quality Show Wanted to Adopt SPC But Often Had Concerns

Statistical Process Control and Quality Monitoring promise cost savings, product improvement, and other benefits, but often overlook the barriers to adoption

[For those wondering: What is Statistical Process Control, SPC?]

SPC sounds amazing, especially from the vendors that provide it (we're guilty too). It promises all kinds of benefits:

  1. Cost savings
  2. Time savings
  3. Rapid problem solving
  4. Powerful root cause analysis
  5. Clear communication with suppliers and organization
  6. Standardized reporting 
  7. Real-time quality monitoring
Topics: SPC Webinar QDM

Improve Supplier Quality with SPC Software Standardization

Standardizing Measurement Processes from OEM to Suppliers

Having a system to standardize communication between suppliers and OEM's 

Topics: CATIA 3DCS SPC CATIA V6 QDM Siemens NX 3DCS Creo PTC Creo

A QIF Case Study Webinar – Maintaining the Digital Thread from OEM to Supplier

A QIF Case Study – Maintaining the Digital Thread from OEM to Supplier

Passing 3D model data without a drawing from an Original Equipment Manufacturer (OEM) to a supplier generally creates interoperability chaos - how do you streamline this process?

Learn from guest presenter Ryan Gelotte CTO at Action Engineering in this webinar hosted by DCS

Topics: CATIA 3DCS SPC CATIA V6 Webinar QDM Siemens NX PTC Creo

The Value of Supply Chain Quality Standardization

The Value of Supply Chain Standardization: Standardizing Measurement Processes from OEM to Suppliers

Topics: CATIA 3DCS SPC QDM Siemens NX 3DCS Creo PTC Creo

Thank You for a Great 2018 - More to Come in 2019

Welcome to 2019 - Let's Get Started

Let's Talk About 2018 and What's In Store for 2019

2018 has been a good year. DCS is happy to welcome new clients, and work further with existing clients as Quality 4.0 and Tolerance Analysis continue to develop. 

Topics: CATIA 3DCS Tolerance Analysis T&T SPC FEA CATIA V6 Webinar Siemens NX 3DCS Creo PTC Creo

Is Cloud Computing Really Better for Business? Survey says...

Is Cloud Computing Really Better for Business? Survey says... 

Topics: CATIA 3DCS Tolerance Analysis SPC CATIA V6 Webinar QDM Siemens NX 3DCS Creo PTC Creo

3 Tools to Tackle Tough Tolerance Negotiations - Using Data to Support Tolerance Changes

3 Tools to Support Tough Tolerance Negotiations 

DCS Solutions offer a number of tools to support your tolerance discussions with customers. 

Tolerance Negotiations are never easy. Customers will try to hold their suppliers to difficult or over-engineered tolerances, or simply don't know that certain tolerances can be opened without affecting the assembly quality, or need to be opened (increased) in order to keep costs reasonable. 

DCS provides 3 tools to support tolerance negotiation by using data to back up tolerance change requests: 

1. Tolerance Negotiator -- QDM Analyst Tool

2. 3DCS Variation Analyst Simulation Results

3. QDM Management Reports 


1. Tolerance Negotiator - QDM Analyst Tool 

How do I get it?

Tolerance Negotiator is built into the base QDM Analyst software, without the need for add-ons or additional purchases. If you have QDM Analyst, the standalone QDM template maker software, you have Tolerance Negotiator. 

Using Tolerance Negotiator

Tolerance Negotiator is under the Tools tab of QDM Analyst. 

After clicking Tolerance Negotiator, a table with all of the imported data measurements is generated.

Two types of data are usually used in Tolerance Negotiator.

Plant and Measured Data can be imported from any inspection device and used to demonstrate production tolerances and metrics. Suppliers use the first 30 parts in a production line, or prototype measurements to demonstrate measured values and whether they are meeting or failing to meet statistical objectives (Pp or Cp). 

Simulation data from an analysis tool can also be used before production. As a DCS Software, QDM is already configured to utilize 3DCS data. Importing 3DCS simulation results can show the risk of failure for given objectives. 

Tolerance Negotiator gives two sets of values:

1. Tolerance changes required to meet given Cp / Pp objectives

2. How Tolerance changes affect Cp and Pp 

This lets the user change tolerances, values and objectives and instantly see the results. For example, if your customer gave a required Pp of 1.33, you can show which tolerances in the provided design can actually meet that objective. With 3DCS, you can demonstrate how 3D stack ups affect those tolerances and further determine the final Pp or Cp values, and may affect the final range of variation. 

Tolerance Negotiator Demonstration

The video below demonstrates how the use of Tolerance Negotiator:


2. 3DCS Variation Analyst Simulation Results

3DCS Variation Analyst simulates assembly builds across a normal distribution (default) using Monte Carlo Simulation. Incorporating part tolerances and assembly processes, 3DCS provides outputs of simulated measurements that include the 3 dimensional variation stack of all parts and processes in the model. 

The results are the measured results of hundreds or thousands of virtual product builds compiled and analyzed statistically. Beneath the simulation results are the sensitivity results, which include the largest contributing tolerances to the given measure. 

In the simulation results window, upper and lower specification limits can be dragged to adjust and see the statistical outputs, Cp and Pp, change accordingly. It also demonstrates the expected failure rate for each given measurement with its given specification limits. This information can be valuable in showing the risk of build failure for each feature based on current design specifications, and how changes can affect either the Cp/Pp or the risk of failure. Adjusting a tolerance and re-running the analysis can show the change to the simulation results and whether an adjustment will positively or negatively affect the model outputs. 

Here is a video example of one method of how 3DCS simulation results can be used for tolerance negotiation: 


3. QDM Management Reports

QDM Management Reports are an effective way to present results to managers and business leaders. They summarize and display simulation or production results, giving visual context and information to make it easy to understand the content. 

Within the reports, as part of tolerance negotiation, a user can set specification limits or pass/fail criteria and color coding to show whether given measurements passed or failed inspection. 

This is a good way to show simulation results from 3DCS or production data in QDM and whether those simulation results will meet quality expectations. It can be helpful for pointing out trouble areas and leading into a tolerance negotiation on resolutions for those given measurements and tolerances. 

Learn more about Tolerance Negotiation and Supplier Quality with Supplier Quality for Suppliers Webinar - FREE On-Demand 

Click to View the Webinar

Topics: CATIA 3DCS Tolerance Analysis SPC CATIA V6 Webinar QDM Siemens NX 3DCS Creo PTC Creo