All  Engineering and Technology Information in One Place.....


About This Site

Sections  Directory

Search This Site

Privacy Policy

For Discussion of These Topics + Visit  the New Engitek Science and Technology Forum


Tired of looking for a job?, Cansado de buscar trabajo?


Semiconductors Devices


Electronics Technology Information Sites


Science and Tech Forum


Electronics Engineering Information by Categories


Engineering and Science Software


Free Science-Tek Magazines and Publications


Regulatory Offices and Agencies and Standards


Patents  Information


Prototypes Developing Houses, Devices and Tools


IC’s Foundries  and IC Development Services


Certification Labs


Operation Manuals


Physics Units Converter Calculators

Convert any type of unit into any other of any system or scale


Alternative Energies Tutorials:


Ocean Energy

Wind Energy

Solar Energy



Lean Manufacturing Tutorials:

The Seven Causes of Waste

The 5S

The 5 Why’s

The 4 M’s +1

Cause Effect / Fish Diagram  

The 4W’s +H+W



Project Charter Example

Value Stream Mapping Introduction and Icons

Current or Present State Map

Future Sate Mapping

Cell Production

Kanban Production System




Electronics and Electromechanical Distributors


Jobs Portal

Easily find your dream Job


Technology News


Science News


Business News


Electronics, RF and Communication Concepts

Rsistors and capacitors colors code

The Logarithm

The bel, decibel , the dbm and the dbmv

Electrical noise definition and Thermal noise

Signal to noise ratio


Lowest Prices for Solar Cells

Best Solar Energy Books

Lowest price Solar Panels

Wind Turbines and Parts

Best Wind Energy Books

Search this site

Para nuestros amigos de habla hispana, los invitamos a visitar el portal tecnológico en español:



The Seven Causes of Waste


The Seven Causes of Waste:


Lean manufacturing has defined seven causes of waste, all companies have experienced one or more of the waste types described below.


Companies that fail to control such wastes are companies that sooner or later will be out of business. Control of the “seven wastes” is a must for any organization or company that is planing to succeed.



1-Overproduction OP:

Overproduction causes consumption of raw materials that otherwise could be used on actually demanded products, OP causes inadequate use of personnel, plus product and material accumulation in the production floor that difficult the manufacturing process and inventories.


2-Unnecessary Inventories:

Results in captive monetary resources that are not producing profit, increases tax liability, make use of valuable storage space that can not be used for other purposes, accumulated not sold inventories are at  high risk of being damaged or rendered obsolete.

3-Unnecessary Transport of Materials or Equipment:

Facilities that do not permit good floor manufacturing layouts, process and other factors can cause unnecessary transport of materials and equipment.


4-Inadequate or Obsolete Manufacturing Process:

Inadequate, necessary or obsolete manufacturing process causes low productivity and defects prone operation, for example movement of people that do not add value to the product.


5-Defects or bad Quality from Process or Design:

Poorly designed product or lack of good manufacturing instructions or training can causes reworks, waste, bad quality products,  customer low rating and products returns.


6-Waiting Time for Materials, Tools or Persons:

This lack of synchronization among all these production elements, during process or sourcing causes delays on production and idle personnel and machinery.


7-Bad Process Design and Layouts:

Causes unnecessary actions or movement of people, tools, materials or equipment.


More about lean manufacturing topics >>