(696 days)
Use of the KION Anesthesia System is indicated for adult or infant populations in an environment where patient care is provided by Healthcare Professionals, trained in the administration of anesthesia, when the professional determines that a device is required to assist the breathing of the patient. This device can be used to administer anesthesia while controlling the entire ventilation for patients without any ability to breathe, as well as for supporting patients with reduced ability to breathe.
KION is a modular anesthesia system. It is available as a set of hardware and software options, which can be added to take the system from being a low-cost, general purpose anesthesia machine, to a complete state-of-the-art anesthesia workstation. This gives the opportunity to specify a system and then upgrade and modify the system as needs change in the future. The KION anesthesia system is designed to enable the operator to work with the basic components of an anesthesia system in the most suitable way for each patient case. As such, the system is mounted on wheels to allow it to be easily moved into an optimum position, where many of the components can also be individually rotated. The KION system is intended for use on adult and pediatric patients. Physically, the KION consists of three main sections: The Trolley which contains the main pneumatic inlets, power supply and power inlets, battery, communication ports, and the gas delivery system. The Column consists of a revolving Vaporizer Holder, Servo Bellows Absorber and Patient Cassette. The Integrated User Interface consists of the Control Panel and the Monitor. The KION offers the following standard ventilation capabilities: Volume controlled ventilation, Manual ventilation.
The provided text is a 510(k) summary for the KION Anesthesia System, which is a submission to the FDA requesting clearance to market a medical device. This document focuses on demonstrating substantial equivalence to existing legally marketed devices, rather than an in-depth study proving novel acceptance criteria for an AI/ML device. Therefore, much of the requested information about device performance, study design, and ground truth establishment is not typically found in such a document for this type of device.
However, I can extract the relevant information based on the typical content of a 510(k) submission for a non-AI/ML medical device like an anesthesia system.
Here's an analysis of the provided text with respect to your questions:
1. A table of acceptance criteria and the reported device performance
For a device like an Anesthesia System, acceptance criteria are typically related to fundamental performance characteristics (e.g., accuracy of gas delivery, ventilation parameters, alarm functionality) and compliance with international standards. The document primarily establishes equivalence to predicate devices and adherence to relevant standards.
The table below summarizes the key performance parameters mentioned in the "Table of Device Similarities and differences to predicate device" (Section 6) and implicitly considers these as performance benchmarks. However, explicit "acceptance criteria" with specific thresholds are not detailed in this summary, as is common for 510(k) summaries of non-AI devices when claiming equivalence. The "reported device performance" is essentially that the KION system meets or improves upon the performance of the predicate devices.
| Parameter | Acceptance Criteria (Implied / Predicate Device Performance) | Reported Device Performance (KION Anesthesia System) |
|---|---|---|
| Applications and Intended Use | Infants to Adults | Same (Infants to Adults) |
| Fresh gas dosage Range | Predicate: 500 ml/min - 40 l/min | 100 ml/min - 18lpm (Enhanced functionality for low flow applications) |
| Fresh gas dosage Accuracy | +/- 10% | Same (+/- 10%) |
| Oxygen Percent | 21% / 25% - 100% (Air / N₂O) | 21% / 28% - 100% (Air / N₂O) (Enhanced anti-hypoxic measures) |
| Oxygen/Nitrous Oxide Ratio | Anti-hypoxia device present | Same (Anti-hypoxia device present) |
| Tidal Volume | Predicate: 2 - 1500 ml | 20 - 1500 ml (Altered functionality, no neonatal capability on Kion, but still within adult/pediatric range and specified) |
| CMV Rate | Predicate: 0.5 - 120 | 6 - 99 (Enhanced functionality due to specific clinical anesthesia requirements) |
| I:E Ratio | Predicate: 1:4 - 4:1 in seven steps | 1:3 - 4:1 in five steps (Enhanced functionality due to specific clinical anesthesia requirements) |
| Pause Time | Predicate: 0, 5, 10, 20, 30% of cycle | 10% of cycle in Volume Control Mode (except for I:E - 4:1 = 0%) (Enhanced functionality due to specific clinical anesthesia requirements) |
| Monitored Parameters | Inspired Tidal Volume, Expired Tidal Volume, Rate, Peak airway Pressure, Mean Airway Pressure, Pause Pressure, PEEP/CPAP, Airway pressure / Analogue Display (from predicate devices) | Same (All listed monitored parameters are present in KION) |
| Ventilatory Alarms | High Airway Pressure, High Continuous Airway Pressure, Disconnect, Low Minute Volume, Low O₂ Concentration (from predicate device) | Same, plus new alarms: Low Air Supply Wall and Tank, Low O₂ Supply Wall and Tank, Low N₂O Supply Wall and Tank, High Air Supply Wall and Tank, High O₂ Supply Wall and Tank, High N₂O Supply Wall and Tank, Low Battery Capacity (Enhanced functionality) |
| Standards Compliance | IEC 601-1, IEC 601-1-1, IEC 601-1-2, ISO/DIS 8835-1.2, prEN 794-1, ISO 7767 | KION complies to these standards. This is a critical acceptance criterion for medical devices. |
2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)
The document states: "See the test results under section In-house Testion T, in this submission." This indicates that in-house testing was performed. However, the 510(k) summary does not provide details on the sample size used for this testing, nor the data provenance (e.g., country of origin, retrospective/prospective nature). For a device like an anesthesia system, "test set" would typically refer to the various simulations, bench tests, and potentially animal studies, as well as the manufacturing quality control tests conducted during development.
3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g. radiologist with 10 years of experience)
This information is not provided in the 510(k) summary. For this type of device, ground truth (or verification/validation reference) would be established through engineering specifications, validated test equipment, and recognized scientific and medical principles for measurement accuracy and safety, rather than through expert consensus in the way it might be for AI/ML imaging devices.
4. Adjudication method (e.g. 2+1, 3+1, none) for the test set
This information is not provided in the 510(k) summary. Adjudication methods are typically associated with human review processes, often in clinical studies or for establishing ground truth for AI/ML models. For an anesthesia system, verification and validation would follow engineering testing protocols.
5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance
No. A Multi-Reader Multi-Case (MRMC) comparative effectiveness study is specific to diagnostic imaging devices, particularly those involving human interpretation (readers) and AI assistance. This device (KION Anesthesia System) is an anesthesia delivery and monitoring system and does not involve "readers" or "AI assistance" in the diagnostic interpretation sense. Therefore, this type of study was not conducted or applicable.
6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done
No. This refers to the standalone performance of an algorithm, typically for AI/ML devices. The KION Anesthesia System is a physical medical device with hardware and integrated software for control and monitoring, not a standalone software algorithm in the context of AI/ML.
7. The type of ground truth used (expert concensus, pathology, outcomes data, etc)
For an anesthesia system, the "ground truth" for performance would be engineering specifications, validated measurement standards and equipment, and established physiological parameters. For example, the accuracy of gas flow would be measured against calibrated flow meters, and alarm thresholds would be set based on clinical safety guidelines and physiological limits. The summary does not explicitly detail these "ground truth" methods but implies them through adherence to standards and in-house testing.
8. The sample size for the training set
This question is not applicable as the KION Anesthesia System is not an AI/ML device that requires a "training set" in the context of machine learning.
9. How the ground truth for the training set was established
This question is not applicable as the KION Anesthesia System is not an AI/ML device that requires a "training set" or ground truth for such a set.
{0}------------------------------------------------
510(k) SUMMARY
as required per 807.92(c)
-
- Submitters Name, Address:
Siemens Medical Systems, Inc. Electromedical Systems Group, PCS Danvers, MA 01923 Tel: (508) 750-7500 Fax: (508) 777-3398
- Submitters Name, Address:
Official Correspondent: David Simard, Director Quality Assurance & Regulatory Affairs
Contact person for this submission: Wulf R. Trepte Quality Assurance Date submission was prepared: 16/10/97
Trade Name, Common Name and Classification Name: 2.
- Trade Name: A
KION Anesthesia System
Common Name, Classification Name, Class and Regulation Number: B.
| Common Name | Classificationn Number | Class | Regulation Number |
|---|---|---|---|
| Gas-machine, Anesthesia | 73BSZ | II | 21 CFR 868.5160 |
| Gas-machine, Analgesia | 73ELI | II | 21 CFR 868.5160 |
| Cardiac monitor | 74DRT | II | 21 CFR 870.2300 |
| Pulse rate monitor | 74BWS | II | 21 CFR 870.2300 |
| Pulse oximeter | 74DQA | II | 21 CFR 870.2700 |
| Breathing Frequency Monitor | 73BZQ | II | 21 CFR 868.2375 |
| Clinical Electronic Thermometer | 80BWX | II | 21 CFR 880.2910 |
| Indwelling Blood Pressure Monitor | 74CAA | II | 21 CFR 870.1110 |
| Heart Rate Monitor, Neonatal | 74FLO | II | 21 CFR 870.2300 |
| Ventilatory Effort Monitor (Apnea Detector) | 73FLS | II | 21 CFR 868.2375 |
| Monitor Blood Pressure, Neonatal, Invasive | 74FLP | II | 21 CFR 870.1110 |
| Arrhythmia detector & Alarm | 74DSI | III | 21 CFR 870.1025 |
| Medical Cathode-Ray Tube Display | 74DXJ | II | 21 CFR 870.2450 |
| ST Segment Monitor with Alarm | 74MLD | III | 21 CFR 870.1025 |
| Non-indwelling Blood Pressure Monitor | 74DXN | II | 21 CFR 870.1130 |
| End-tidal Carbon-Dioxide Monitor | 73CCK | II | 21 CFR 868.1400 |
COMPANY CONFIDENTIAL
Sicmens-Elema AB Electromedical Systems Division
Röntgenvägen 2 S-171 95 Solna SWEDEN
Tel. (46) 8 730 7228 Fax. (46) 8 98 63 05
{1}------------------------------------------------
3. Predicate Device Identification:
| Legally marketed devices to which equivalence is being claimed | 510(k) # |
|---|---|
| Siemens Servo Ventilator 900C | K841529 |
| Servo Ventilator 900C/D Electronic gas supply unit | K871354 |
| Servo Ventilator 900C/D CAV 1.0 Master Program Flow & Prs, CO2 Lung Monitor | K861707 |
| Servo Ventilator 900C/D P.C. Interface | K852771 |
| Servo Ventilator 900C/D CAV 4.0 Software Servo Graphics | K923444/A |
| Servo Ventilator 900C/D Man. Vent. Acc. | K854036 |
| Servo Ventilator 900C/D/E CAV 3.0 Software | K890932 |
| Siemens Servo Anesthesia Circle 985 | K893786 |
| Siemens Vaporizers 950/951/952 | K841157 |
| Ohmeda Tec5 Vaporizer | K942091 |
| Siemens Servo Ventilator 300 | K960010 |
| Siemens SC9000/SC9015 Bedside Monitoring System | K946306 |
4. Device Description:
KION is a modular anesthesia system. It is available as a set of hardware and software options, which can be added to take the system from being a low-cost, general purpose anesthesia machine, to a complete state-of-the-art anesthesia workstation. This gives the opportunity to specify a system and then upgrade and modify the system as needs change in the future. The KION anesthesia system is designed to enable the operator to work with the basic components of an anesthesia system in the most suitable way for each patient case. As such, the system is mounted on wheels to allow it to be easily moved into an optimum position, where many of the components can also be individually rotated. The KION system is intended for use on adult and pediatric patients
Physically, the KION consists of three main sections:
- The Trolley which contains the main pneumatic inlets, power supply and power 1. inlets, battery, communication ports, and the gas delivery system.
- The Column consists of a revolving Vaporizer Holder, Servo Bellows Absorber 2. and Patient Cassette.
- The Integrated User Interface consists of the Control Panel and the Monitor. 3.
The KION offers the following standard ventilation capabilities:
- . Volume controlled ventilation
- . Manual ventilation
5. Intended Use:
The intended use for the KION is as a modular anesthesia system for use on Adult and Infant patient populations. The unit is designed to be used in the operating room or any other hospital location where administration of anesthesia is necessary.
2 COMPANY CONFIDENTIAL
Siemens-Elema AB Electromedical Systems Division
Röntgenvägen 2 S-171 95 Solna SWEDEN
Tel. (46) 8 730 7228 Fax. (46) 8 98 63 05
{2}------------------------------------------------
6. Table of Device Similarities and differences to predicate device
| Manufacturer | Siemens-Elema AB,Electromedical SystemsDivision | Siemens-Elema AB,Electromedical SystemsDivision | - |
|---|---|---|---|
| 510(k) number | Predicate devicesSiemens Servo ventilator 900C - K841529 Siemens Servo Ventilator 300 - K960010 Servo Anesthesia Circle 985 - K893786. Siemens Vaporisers 950, 951, 952 - K841157. Ohmeda Tec 5 vaporiser - K942091. Siemens Servo Screen - K960168 | Modified DeviceKlon Anesthesia SystemK number to be decided | - |
| Parameters General | Predicate devices: All | Modified DeviceKlon Anesthesia System | Explanation of the differences comparedto the Predicate devices |
| Applications and Intended Use | Infants to Adults | Same | - |
| Gas Delivery System | Pneumatic Powered ServoControlled "Bag in Bottle"system. | Same | - |
| Battery Back up | No | Yes | Battery backup for the 900C is only availablewith an external system. |
| Parameters Gas Dosage | Predicate devicesSiemens Servo ventilator 900C- K841529Servo Anesthesia Circle 985 -K893786. | Modified DeviceKion Anesthesia System | Explanation of the differences comparedto the Predicate devices |
| Fresh gas dosageRange | Range:500 ml/min - 40 l/min | Range: 100 ml/min - 18lpm | Enhanced functionality on Kion for low flowapplications |
| Accuracy | +/- 10% | Same | - |
| Oxygen Percent | 21% / 25% - 100%(Air / N2O) | 21% / 28% - 100%(Air / N2O) | Enhanced anti-hypoxic measures |
| Gas Mixture Setting | O₂/Air or O₂/N₂O | Same | - |
| Anti-hypoxia device(Limits O₂/N₂O fresh gas ratio) | Yes | Same | - |
| Ventilator Integral | Yes | Same | - |
| Anesthetic Vapour DeliveryModules | Predicate devicesSiemens Vaporizers950/951/952 and OhmedaTec5 | Modified DeviceKion Anesthesia SystemVaporizers | Explanation of the differences comparedto the Predicate devices |
| Operating Principle | High pressure precisioninjector | Same | - |
Magazine for three
vaporizers mounting
3
Single vaporizer mounting
COMPANY CONFIDENTIAL
Siemens-Elema AB Electromedical Systems Division
Vaporizer mounting
Röntgenvägen 2 S-171 95 Solna SWEDEN
Tel. (46) 8 730 7228 Fax. (46) 8 98 63 05
Enhanced functionality.
{3}------------------------------------------------
| Breathing Systems | Predicate devicesSV 900 and ServoAnesthetic Circle 985 | Modified DeviceKion Anesthesia System | Explanation of the differences compared to thePredicate devices |
|---|---|---|---|
| Circle System | Yes | Same | |
| Auxiliary Fresh Gas Outlet | No | Yes | Enhanced functionality to support external breathingsystems (e.g. Bain, T-piece) |
| Adjustable Pressure Regulating(APL) valve | No | Adjustable to 90 cm H2O | Improved functionality |
| Ventilation Modes | Predicate devicesSV 900C | Modified DeviceKion Anesthesia System | Explanation of the differences compared to thePredicate devices |
| Manual | Yes | Same | |
| Volume Controlled Ventilation | Yes | Same | |
| Pressure Controlled Ventilation | Yes | No | Planned for future enhancement in Kion |
| Pressure Support | Yes | No | Planned for future enhancement in Kion |
| Ventilatory Control Settings | Predicate devicesSV 300 | Modified DeviceKion Anesthesia System | Explanation of the differences compared to thePredicate devices |
| Preset Minute Volume | 0.5 - 45LPM | Same | |
| Tidal Volume | 2 - 1500 ml | 20 - 1500 ml | Altered functionality, no neonatal capability on Kion. |
| CMV Rate | 0.5 - 120 | 6 - 99 | Enhanced functionality due to specific clinicalanesthesia requirements |
| I:E Ratio | 1:4 - 4:1 in seven steps. | 1:3 - 4:1 in five steps. | Enhanced functionality due to specific clinicalanesthesia requirements |
| Pause Time | 0, 5, 10, 20, 30% of cycle | 10% of cycle in VolumeControl Mode ( except for I:E- 4:1 = 0%) | Enhanced functionality due to specific clinicalanesthesia requirements |
| Inspiratory Gas Flow | Maximum 180 lpm | Same | |
| Monitored Ventilatory &Respiratory parameters | Predicate DevicesSV 900 and Servo Screen390 | Modified DeviceKion Anesthesia System | Explanation of the differences compared to thePredicate devices |
| Inspired Tidal Volume | Yes | Same | |
| Expired Tidal Volume | Yes | Same | |
| Rate | Yes | Same | |
| Peak airway Pressure | Yes | Same | |
| Mean Airway Pressure | Yes | Same | |
| Pause Pressure | Yes | Same | - |
| PEEP/CPAP | Yes | Same | - |
| Airway pressure / AnalogueDisplay | Yes | Same | - |
| Ventilatory Alarms | Predicate DeviceSV900 | Modified DeviceKion Anesthesia System | Explanation of the differences compared to thePredicate devices |
| This device has the following | Same | Enhanced functionality. In addition Kion also have thefollowing alarms |
| This device has the following | Same | Enhanced functionality. In addition Kion also have the |
|---|---|---|
| alarms: High AirwayPressure, High Continuous | following alarms: | |
| Airway Pressure, Disconnect, | Low Air Supply Wall and Tank, Low 02 Supply Wall | |
| Low Minute Volume, Low 02 | and Tank, Low 02 Supply Wall and Tank, Low N20 | |
| Concentration | Supply Wall and Tank, High Air Supply Wall and | |
| Tank, High 02 Supply Wall and Tank, High N20 | ||
| Supply Wall and Tank, Low Battery Capacity |
4
COMPANY CONFIDENTIAL
Siemens-Elcma AB Electromedical Systems Division
Röntgenvägen 2 S-171 95 Solna SWEDEN
Tcl. (46) 8 730 7228 Fax. (46) 8 98 63 05
{4}------------------------------------------------
-
- Assessment of non-clinical performance data for equivalence: See the testresults under section In-house Testion T, in this submission.
-
- Assessment of clinical performance data for equivalence: Clinical trials ongoing.
-
- Biocompatability: Not applicable
- Sterilization: Not applicable
11. Standards and Guidances:
KION complies to the following standards:
- · IEC 601-1 (EN 60601-1) Medical Electrical Equipment, part 1: General requirements for safety.
- · IEC 601-1-1 (EN 60601-1-1) Medical Electrical Equipment, part 1.1: Safety Requirements for medical electrical systems.
- · IEC 601-1-2 (EN 60601-1-2) Medical Electric Equipment, part 1.2: Electromagnetic Compatibility- Requirements and Tests
- · ISO/DIS 8835-1.2 (Forthcoming IEC 60601-2-13, 2nd Ed.) Anesthesia Workstations and Their Components.
- · prEN 794-1 Lung ventilators-Part 1: Particular Requirements for Critical Care Ventilators.
- · ISO 7767 Oxygen monitors for monitoring patient breathing mixtures- Safety Requirements.
COMPANY CONFIDENTIAL
Siemens-Elema AB Electromedical Systems Division
Röntgenvägen 2 S-171 95 Solna SWEDEN
Tel. (46) 8 730 7228 Fax. (46) 8 98 63 05
{5}------------------------------------------------
Image /page/5/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized image of an eagle with its wings spread.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
SEP 1 3 1999
Mr. David Simard Simens Medical Systems, Inc. 16 Electronics Avenue Danvers, MA 01923
Re: K973971 KION Anesthesia System III (three) Requlatory Class: Product Code: 73 BSZ and 74 DSI July 20, 1999 Dated: Received: July 21, 1999
Dear Mr. Simard:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (Premarket Approval), it may be subject to such additional controls. Existing major requlations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic QS inspections, the Food and Druq Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in requlatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
{6}------------------------------------------------
Page 2 - Mr. David Simard
This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4648. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597, or at its internet address "http://www.fda.gov/cdrh/dsma/dsmamain.html".
· Sincerely yours,
Thomas J. Callahon
Thomas J. Callahan, Ph.D. Director Division of Cardiovascular, Respiratory, and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{7}------------------------------------------------
Page_1_of_1__
K973971 510(k) Number (if known):__
Device Name: ________________________________________________________________________________________
Indications for Use:
Use of the KION Anesthesia System is indicated for adult or infant populations in an environment where patient care is provided by Healthcare Professionals, trained in the administration of anesthesia, when the professional determines that a device is required to assist the breathing of the patient. This device can be used to administer anesthesia while controlling the entire ventilation for patients without any ability to breathe, as well as for supporting patients with reduced ability to breathe.
MRI Compatibility Statement:
Siemens KION is not compatible for us in a MRI magnetic field.
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
| Concurrence of CDRH, Office of Device Evaluation (ODE) | |
|---|---|
| -- | -------------------------------------------------------- |

| Prescription Use | ✓ | OR | Over-The-Counter Use | |
|---|---|---|---|---|
| (Per 21 CFR 801.109) |
(Optional Format 1-2-96)
| (Division Sign-Off) | |
|---|---|
| Division of Cardiovascular, Respiratory, | |
| and Neurological Devices | |
| 510(k) Number | K973971 |
§ 868.5160 Gas machine for anesthesia or analgesia.
(a)
Gas machine for anesthesia —(1)Identification. A gas machine for anesthesia is a device used to administer to a patient, continuously or intermittently, a general inhalation anesthetic and to maintain a patient's ventilation. The device may include a gas flowmeter, vaporizer, ventilator, breathing circuit with bag, and emergency air supply.(2)
Classification. Class II (performance standards).(b)
Gas machine for analgesia —(1)Identification. A gas machine for analgesia is a device used to administer to a patient an analgesic agent, such as a nitrous oxide-oxygen mixture (maximum concentration of 70 percent nitrous oxide).(2)
Classification. Class II (performance standards).